Happy Birthday Wishes for Teachers: Teachers play a big role in shaping who we become. They guide us, support us, and believe in us even on our toughest days. On their birthday, it’s our turn to make them feel special.

Finding the right words can sometimes feel hard. That’s why we’ve put together a list of birthday wishes for every kind of teacher. Whether it’s your favorite mentor, a strict sir, or a caring ma’am, you’ll find something that fits.

Happy Birthday Wishes for Teacher in English

• Happy birthday to a teacher who inspires with patience and love. May your day be filled with joy, laughter, and endless smiles.
• Wishing you a birthday as bright as the future you help us build. Thank you for shaping our minds every single day.
• On your special day, I want you to know how much you’re appreciated. Happy birthday to the best teacher a student could ask for.
• May this birthday bring you as much happiness as you bring to your students. Have a wonderful and memorable celebration today.
• Your dedication and kindness make every lesson unforgettable. Happy birthday and thank you for everything you do for us.
• Here’s to a teacher who makes learning feel like an adventure; wishing you a fantastic birthday filled with love and laughter.
• Happy birthday to someone who teaches with the heart, not just the mind. May your day be as wonderful as you are.
• Thank you for believing in us even when we doubted ourselves. Happy birthday to a truly remarkable teacher and mentor.
• Wishing you a day filled with cake, laughter, and all the love you deserve. Happy birthday, dear teacher.
• You make every classroom feel like home. Happy birthday to a teacher who truly cares.

Heart Touching Happy Birthday Wishes for Teacher

• You taught me more than just lessons; you taught me how to believe in myself. Happy birthday to a teacher who changed my life.
• Every word of encouragement you gave stayed with me long after class ended. Happy birthday to someone who truly made a difference.
• Teachers like you don’t just teach; you leave a permanent mark on our hearts. Wishing you the happiest of birthdays today.
• I may not always say it, but I’m grateful for you every single day—happy birthday to a teacher who means the world to me.
• Your patience and guidance shaped who I am today. Happy birthday to the person I owe so much of my growth to.
• You saw potential in me when I couldn’t see it myself—happy birthday to a teacher whose faith in me never wavered.
• The lessons you taught outside the textbook are the ones I remember most. Happy birthday to a truly inspiring soul.
• You gave me wings when I didn’t even know I could fly, happy birthday to the teacher who believed in me first.
• Some teachers teach subjects, but you taught me life. Happy birthday to someone who will always hold a special place in my heart.
• I still carry your words with me on my hardest days. Happy birthday to a teacher whose impact never fades.

Short & Simple Birthday Wishes for Teachers

• You changed my life in ways words can’t express. Happy birthday to a truly special teacher.
• Thank you for everything you taught me, happy birthday to someone who shaped my heart and mind.
• Your kindness left a mark on my soul. Happy birthday, dear teacher.
• You believed in me when no one else did. Happy birthday to my forever mentor.
• Because of you, I became better; happy birthday to a teacher I’ll never forget.
• Your guidance still lives in my heart; happy birthday to you always.
• You taught me more than books ever could; happy birthday, dear teacher.
• Grateful doesn’t cover how I feel; happy birthday to an unforgettable teacher.
• You gave me strength I didn’t know I had. Happy birthday, my mentor.
• Simple words, deep gratitude, happy birthday to the best teacher ever.

Happy Birthday Gift Ideas for Teacher 

• Personalized Notebook or Journal – Add their name or a thank-you message for a thoughtful touch.
• Handwritten Thank-You Card – A heartfelt note often means more than any store-bought gift.
• Coffee or Tea Gift Set – Perfect for teachers who need that morning boost before class.
• Customized Mug – Printed with a funny or sweet message just for them.
• Books by Their Favorite Author – A thoughtful gift for teachers who love reading.
• Desk Organizer or Planner – Helps keep their classroom essentials tidy.
• Scented Candles – A relaxing gift for unwinding after a long day of teaching.
• Gift Cards – To their favorite bookstore, café, or clothing store for a flexible option.
• Classroom Supplies – Practical items like markers, sticky notes, or stationery they’ll actually use.
• A Class Photo Frame – A sentimental keepsake featuring their students that they’ll cherish for years.

Birthday Wishes for Male Teachers

• Sir, your wisdom and strength have guided so many of us. Happy birthday to a truly remarkable teacher.
• Happy birthday, sir, thank you for being both a mentor and a role model to us all.
• Your discipline and dedication have taught us more than any textbook. Happy birthday, sir.
• Wishing a very happy birthday to a teacher whose guidance feels like a father’s care.
• Sir, you’ve shown us how to lead with confidence and kindness. Happy birthday to you.
• Happy birthday to a teacher who commands respect not through fear, but through wisdom and warmth.
• Your calm strength has always kept our class grounded. Happy birthday, sir, and thank you.
• Sir, your lessons in life have been just as valuable as your lessons in class. Happy birthday to you.
• Happy birthday to a teacher whose firm guidance shaped us into better individuals.
• Wishing our respected sir a birthday full of the same joy he brings to our classroom every day.

Birthday Wishes for Female Teachers

• Ma’am, your grace and wisdom light up every classroom. Happy birthday to a truly inspiring teacher.
• Happy birthday to a teacher whose gentle strength has guided so many of us through life’s lessons.
• Ma’am, you teach with your heart as much as your mind, wishing you the happiest of birthdays.
• Your warmth makes every student feel valued. Happy birthday to an incredible teacher and role model.
• Happy birthday, ma’am, thank you for nurturing not just our minds but our confidence too.
• Your patience and compassion have shaped countless futures. Happy birthday to a truly special teacher.
• Ma’am, you make learning feel safe and exciting at the same time. Happy birthday to you.
• Wishing a very happy birthday to a teacher whose kindness never goes unnoticed.
• Your strength as an educator and as a woman inspires us daily. Happy birthday, ma’am.
• Happy birthday to a teacher who leads with love, wisdom, and unmatched grace.

New Month August Wishes

Short & Simple Happy Birthday Wishes for Teachers

• Happy birthday, teacher, thank you for everything you do.
• Wishing you a wonderful birthday filled with joy and cake.
• Happy birthday to an amazing teacher, have a great day.
• Hope your birthday is as bright as your smile, happy birthday.
• Happy birthday, teacher; you truly deserve the best.
• Sending warm wishes on your special day, happy birthday.
• Happy birthday to a teacher who makes learning fun.
• Wishing you happiness today and always, happy birthday.
• Have a fantastic birthday, teacher, you’re the best.
• Happy birthday; may your day be as special as you are.

Professional & Respectful Birthday Wishes for Sir / Ma’am

• Wishing you a very happy birthday, sir, and continued success in all your endeavors.
• Happy birthday, ma’am, thank you for your invaluable guidance and support throughout the year.
• On this special day, we extend our warmest wishes for your health and happiness. Happy birthday, sir.
• Happy birthday, ma’am, your dedication to teaching is truly commendable and appreciated.
• Wishing you a joyous birthday, sir, filled with the same excellence you bring to our education.
• Happy birthday, ma’am, may this year bring you continued success and fulfillment.
• On behalf of all your students, we wish you a very happy birthday, sir.
• Happy birthday, ma’am, thank you for your professionalism and unwavering commitment to us.
• Wishing you all the best on your birthday, sir, and gratitude for your mentorship.
• Happy birthday, ma’am, we deeply respect and appreciate everything you do for us.

Explore More Wishes

Heartfelt Birthday Messages to Wish a Teacher

• You’ve guided me through challenges I never thought I could overcome. Happy birthday to my incredible mentor.
• Thank you for believing in my potential before I believed in it myself. Happy birthday, dear mentor.
• Your wisdom has shaped not just my career but my character. Happy birthday to a mentor like no other.
• I wouldn’t be who I am today without your guidance; happy birthday to my greatest mentor.
• You’ve been my compass in moments of doubt, happy birthday to a mentor I deeply admire.
• Every piece of advice you’ve given has stayed with me. Happy birthday to a truly invaluable mentor.
• Your mentorship has been one of the greatest gifts of my life; happy birthday to you.
• Thank you for pushing me to be better every single day. Happy birthday, my dear mentor.
• You saw my potential and helped me grow into it. Happy birthday to a mentor I deeply cherish.
• Words can’t express how grateful I am for your guidance. Happy birthday to my forever mentor.

Inspirational and Motivational Birthday Wishes for an Instructor

• Your passion for teaching inspires us to chase our dreams relentlessly. Happy birthday to a truly motivating instructor.
• You’ve taught us that hard work and dedication always pay off, happy birthday to an inspiring mentor.
• Because of your guidance, we believe anything is achievable. Happy birthday to an incredible instructor.
• Your energy and enthusiasm push us to be our best selves, happy birthday to a motivating force like you.
• You don’t just teach skills, you build confidence and character. Happy birthday to an inspiring instructor.
• Your belief in our potential fuels our determination every day. Happy birthday to a truly motivating teacher.
• You’ve shown us that excellence is a habit, not an accident. Happy birthday to an inspiring instructor.
• Your encouragement has turned our struggles into strengths. Happy birthday to a truly motivational mentor.
• You lead by example, showing us what dedication truly looks like. Happy birthday to an inspiring instructor.
• Because of your guidance, we strive for greatness every single day. Happy birthday to a motivating instructor like you.

Creative & Witty Birthday Wishes for Your Favorite Teacher with a Sense of Humor

• Happy birthday to the teacher who makes Mondays bearable and pop quizzes almost fun. Hope your day is graded A+ in cake and zero in stress.
• You’ve taught us fractions, Shakespeare, and how to survive group projects with our sanity intact. Happy birthday to a legend who deserves a permanent hall pass today.
• Wishing the funniest, sharpest teacher we know a birthday as awesome as your comebacks to “why do we need to know this?” Enjoy every candle, no extra credit required.
• Happy birthday to the one teacher who can silence a rowdy classroom with just a look. Hope today you get nothing but smiles and zero raised hands asking for the bathroom.
• You turned boring lessons into inside jokes we still remember. Happy birthday to the most quotable teacher in school history.
• Here’s to a teacher who grades papers, cracks jokes, and somehow never runs out of patience. May your birthday be one long recess.
• Happy birthday to the person who taught us that learning and laughing aren’t mutually exclusive. Go enjoy your day — no bells, no bells schedules, no interruptions.
• You’ve mastered the art of teaching AND surviving our terrible excuses for late homework. Happy birthday to a true multitasking hero.
• Wishing a very happy birthday to the teacher who somehow makes even Monday morning announcements funny. Hope your cake is bigger than the stack of papers you have to grade.
• Happy birthday to the teacher who’s equal parts mentor, comedian, and miracle worker. Here’s to another year of making school feel a little less like school.

Happy Birthday Wishes for an English Teacher

• Happy birthday to a teacher who taught us that words truly have power, may your day be poetry in motion.
• You made grammar bearable and literature unforgettable, happy birthday to an amazing English teacher.
• Happy birthday to the teacher who showed us stories can change the way we see the world.
• Thank you for making Shakespeare less scary and more fascinating. Happy birthday, dear English teacher.
• Your love for language inspired us to find our own voice. Happy birthday to a wonderful teacher.
• Happy birthday to a teacher who turned essays into adventures, thank you for your creativity and patience.
• You taught us that every word matters. Happy birthday to an English teacher who truly cares.
• Wishing a very happy birthday to the teacher who made reading feel like magic.
• Happy birthday to a teacher who corrected our sentences and boosted our confidence at the same time.
• Your passion for storytelling made every class memorable. Happy birthday, dear English teacher.

Happy Birthday Wishes for a Math Teacher

• Happy birthday to a teacher who made numbers less scary and problem-solving fun.
• You taught us that every problem has a solution, happy birthday to an amazing math teacher.
• Thank you for turning equations into something we could actually enjoy. Happy birthday, dear teacher.
• Happy birthday to the teacher who proved that math really can be magical.
• Your patience with our endless questions never went unnoticed. Happy birthday to a wonderful math teacher.
• Wishing a very happy birthday to a teacher who made fractions feel like fun.
• You taught us logic, patience, and the beauty of numbers. Happy birthday, dear teacher.
• Happy birthday to a math teacher who turned confusion into clarity every single class.
• Your dedication made even the toughest formulas feel achievable. Happy birthday to you.
• Happy birthday to a teacher who proved math is everywhere, and it’s kind of amazing.

Two-Line Happy Birthday Wishes for Teacher

• Happy birthday, teacher, thank you for shaping who I am today.
• Wishing you joy and success, happy birthday to a wonderful teacher.
• Happy birthday, may your year ahead be as bright as your smile.
• Thank you for everything you teach us. Happy birthday, dear teacher.
• Happy birthday to someone who makes learning truly enjoyable.
• Wishing you happiness and good health, happy birthday, teacher.
• Happy birthday, your guidance means more than words can say.
• May your birthday be filled with love and laughter. Happy birthday, teacher.
• Happy birthday to a teacher who inspires us every single day.
• Wishing you a beautiful birthday, filled with all things good.

Happy Birthday Wishes for Teacher in Hindi

• जन्मदिन की हार्दिक शुभकामनाएं, आपने हमें जो सिखाया वह हमेशा याद रहेगा।
• आपका मार्गदर्शन हमारे जीवन की सबसे बड़ी सीख है, जन्मदिन मुबारक हो।
• जन्मदिन की बहुत बहुत शुभकामनाएं, आप जैसे शिक्षक मिलना सौभाग्य की बात है।
• आपकी मेहनत और लगन हमें हमेशा प्रेरित करती है, जन्मदिन मुबारक हो, गुरुजी।
• जन्मदिन की शुभकामनाएं, आपने हमें सिर्फ किताबें नहीं, ज़िंदगी भी सिखाई।
• आपका आशीर्वाद हमेशा हमारे साथ रहे, जन्मदिन की हार्दिक शुभकामनाएं।
• जन्मदिन मुबारक हो, आपकी शिक्षा हमारे लिए अनमोल है।
• आप जैसे गुरु से सीखना हमारे लिए गर्व की बात है, जन्मदिन की शुभकामनाएं।
• जन्मदिन की ढेरों शुभकामनाएं, आपने हमें सही राह दिखाई है।
• आपका स्नेह और मार्गदर्शन हमेशा याद रहेगा, जन्मदिन मुबारक हो, गुरुजी।

Happy Birthday Wishes for Teachers:

Happy Birthday Wishes for Teacher in Marathi

• वाढदिवसाच्या हार्दिक शुभेच्छा, तुम्ही आम्हाला दिलेले शिक्षण आयुष्यभर लक्षात राहील.
• तुमच्या मार्गदर्शनामुळे आम्ही खूप काही शिकलो, वाढदिवसाच्या शुभेच्छा गुरुजी.
• वाढदिवसाच्या शुभेच्छा, तुमच्यासारखे शिक्षक मिळणे भाग्याचे लक्षण आहे.
• तुमच्या मेहनतीने आमचे भविष्य घडले आहे, वाढदिवसाच्या हार्दिक शुभेच्छा.
• वाढदिवसाच्या शुभेच्छा, तुम्ही आम्हाला फक्त पुस्तकी ज्ञानच नाही, जीवनही शिकवले.
• तुमचा आशीर्वाद नेहमी आमच्यासोबत राहो, वाढदिवसाच्या हार्दिक शुभेच्छा.
• वाढदिवसाच्या शुभेच्छा गुरुजी, तुमचे शिक्षण आमच्यासाठी अनमोल आहे.
• तुमच्याकडून शिकणे हे आमच्यासाठी अभिमानाची बाब आहे, वाढदिवसाच्या शुभेच्छा.
• वाढदिवसाच्या खूप खूप शुभेच्छा, तुम्ही आम्हाला योग्य मार्ग दाखवला आहे.
• तुमचे प्रेम आणि मार्गदर्शन कायम लक्षात राहील, वाढदिवसाच्या हार्दिक शुभेच्छा गुरुजी.

Happy Birthday Wishes for Teacher from Students

• Happy birthday to the teacher who believed in us even when we didn’t believe in ourselves.
• Thank you for shaping our future with your patience and wisdom. Happy birthday, dear teacher.
• Happy birthday to someone who made every classroom feel like a safe space to grow.
• We may not always show it, but we truly appreciate you. Happy birthday, teacher.
• Happy birthday to the teacher who turned our mistakes into lessons and our doubts into confidence.
• Thank you for always going the extra mile for us. Happy birthday, dear teacher.
• Happy birthday to a teacher who taught us more than any textbook ever could.
• We’re lucky to have a teacher like you. Happy birthday and thank you for everything.
• Happy birthday to the person who made learning exciting and school feel like home.
• From all of us students, happy birthday to a teacher we’ll never forget.:

Teacher Birthday Wishes from a Parent

• Happy birthday to the teacher who has become such an important part of my child’s life, thank you for your dedication.
• On your special day, I want you to know how much your guidance has meant to our family. Happy birthday, dear teacher.
• Happy birthday to a teacher who nurtures my child’s potential with such genuine care and patience.
• Thank you for going above and beyond for my child every single day. Happy birthday to an incredible teacher.
• Watching my child grow under your guidance has been such a blessing. Happy birthday and thank you for everything.
• Happy birthday to the teacher who makes my child excited to go to school every morning.
• Your patience and kindness have shaped my child in ways I’m endlessly grateful for. Happy birthday to you.
• Happy birthday to a teacher who treats every student like they truly matter, thank you for everything you do.
• As a parent, I can’t thank you enough for your dedication. Happy birthday to a wonderful teacher.
• Happy birthday to the teacher who has become a second parent to my child, we appreciate you deeply.

Happy Birthday Wishes for College Professors

• Happy birthday to a professor whose lectures shaped the way I think and approach challenges.
• Thank you for pushing us toward excellence and critical thinking. Happy birthday, dear professor.
• Happy birthday to the professor who made complex theories feel accessible and exciting.
• Your mentorship during my academic journey has been truly invaluable. Happy birthday to you.
• Happy birthday to a professor who inspired a genuine passion for learning within me.
• Thank you for challenging us to question, research, and grow. Happy birthday, dear professor.
• Happy birthday to the professor whose guidance shaped my career path in ways I never expected.
• Your dedication to academic excellence continues to inspire your students. Happy birthday to you.
• Happy birthday to a professor who turned lectures into discussions worth remembering.
• Thank you for believing in our potential even in the most demanding semesters. Happy birthday to you.

Religious Happy Birthday Wishes for Teacher

• May God bless you with health, wisdom, and endless joy. Happy birthday to a truly divine soul.
• Wishing you God’s grace and guidance on your special day, happy birthday, dear teacher.
• May the Almighty continue to bless your journey of teaching and touching lives. Happy birthday to you.
• On this blessed day, may peace and prosperity always surround you. Happy birthday, dear teacher.
• May God grant you many more years of health and happiness. Happy birthday to a truly blessed teacher.
• Wishing you divine blessings and inner peace on your birthday, thank you for everything you do.
• May your soul always be filled with light and purpose. Happy birthday to a spiritually grounded teacher.
• On your birthday, I pray for your continued strength and wisdom. Happy birthday, dear teacher.
• May the blessings of the divine guide you always. Happy birthday to a truly noble soul.
• Wishing you a birthday filled with faith, gratitude, and God’s abundant grace.

Formal Happy Birthday Wishes for a Retired Teacher

• Wishing you a joyful birthday filled with the relaxation and peace you’ve truly earned, thank you for your years of service.
• Happy birthday to a retired educator whose legacy continues to inspire generations of students.
• May your retirement bring you the happiness you deserve after years of shaping young minds. Happy birthday to you.
• Wishing you good health and continued joy in this new chapter of life. Happy birthday, dear teacher.
• Happy birthday to a teacher whose contributions to education will never be forgotten.
• May your retirement years be filled with the same fulfillment you brought to your students. Happy birthday to you.
• Wishing you a wonderful birthday and a retirement filled with well-deserved rest and happiness.
• Happy birthday to an educator whose impact on countless lives remains truly immeasurable.
• May this new phase of life bring you peace, joy, and cherished memories. Happy birthday, dear teacher.
• Wishing a very happy birthday to a retired teacher whose legacy continues to shape futures.

Short Happy Birthday Captions for Teacher for Social Media

• Happy birthday to my favorite teacher, forever grateful for you.
• Wishing an amazing teacher the happiest birthday ever, love you.
• Happy birthday, teacher, thank you for shaping who I am today.
• Sending birthday love to the best teacher ever, happy birthday.
• Happy birthday to someone who made school feel like home.
• Grateful for you today and always, happy birthday, teacher.
• Happy birthday to the teacher who changed my life, forever thankful.
• Wishing my mentor the happiest birthday; you deserve the world.
• Happy birthday, teacher, you inspire me every single day.
• Celebrating an incredible teacher today, happy birthday to you.

Heartwarming Happy Birthday Wishes for Special Teachers

• You’ve always been more than just a teacher to me, happy birthday to someone truly special in my life.
• Out of all the teachers I’ve had, you remain my favorite. Happy birthday to an incredible person.
• You made learning feel personal and meaningful. Happy birthday to a teacher I’ll always cherish.
• There’s a reason you’re my favorite teacher of all time, happy birthday to someone truly unforgettable.
• Your impact on my life goes far beyond the classroom; happy birthday to my most special teacher.
• You always made me feel seen and valued, happy birthday to the teacher who means so much to me.
• Out of everyone who’s taught me, you left the deepest impression. Happy birthday to my favorite mentor.
• You’ve earned a permanent place in my heart; happy birthday to a truly special teacher.
• No other teacher compares to the impact you’ve had on me, happy birthday to my favorite educator.
• You made every day brighter just by being you. Happy birthday to a truly special teacher.

Group Happy Birthday Messages for Teachers

• From all of us in class, happy birthday to the best teacher we could ever ask for.
• Our whole class wishes you a happy birthday filled with love, laughter, and cake.
• Happy birthday from all your students. Thank you for making every class memorable.
• From the entire class, we wish you health, happiness, and a fantastic birthday.
• Happy birthday, teacher, from all of us who appreciate you more than words can say.
• Our class wouldn’t be the same without you. Happy birthday from everyone who admires you.
• Happy birthday from your students, thank you for making learning fun every single day.
• All of us in class want to wish you the happiest of birthdays, you truly deserve it.
• From your entire class, happy birthday to a teacher who inspires us all.
• Happy birthday, teacher, from every student who feels lucky to have you.

Belated Happy Birthday Wishes for Teachers

• I know I’m a little late, but happy belated birthday to a teacher who truly deserves celebration.
• Better late than never, happy belated birthday to an incredible teacher who means so much to me.
• Sorry for missing your big day. Happy belated birthday and thank you for everything you do.
• Even though I’m late, my gratitude for you isn’t, happy belated birthday, dear teacher.
• Happy belated birthday to a teacher who deserves celebration every single day, not just one.
• I hope your birthday was as wonderful as you are. Happy belated birthday, dear teacher.
• Apologies for the delay, but my appreciation for you never fades. Happy belated birthday.
• Happy belated birthday to an amazing teacher, hope your day was filled with joy.
• Better late with love than not at all, happy belated birthday, dear teacher.
• Happy belated birthday to a teacher whose impact deserves celebration all year round.

Why Celebrating a Teacher’s Birthday Matters

Teachers give us so much every single day. They teach us lessons, but they also teach us how to be better people. A birthday is the perfect time to say thank you for all of that.

Most teachers work hard without expecting anything back. They rarely hear how much they matter to us. Celebrating their birthday is a simple way to remind them that their effort is seen and appreciated.

A small wish can mean a lot to someone who gives so much. It shows respect, love, and gratitude in a way words alone sometimes can’t. That’s why celebrating a teacher’s birthday truly matters.

Frequently Asked Questions

What to write in a birthday card for a beloved teacher

Write a simple thank-you note expressing gratitude for their guidance and support. Mention a specific memory or lesson that made a difference in your life.

Gift ideas to accompany a birthday wish for an educator

A handwritten card, a coffee mug, or a small planner make thoughtful additions. Classroom supplies or a gift card are also practical and appreciated choices.

Best websites to find happy birthday messages for teachers

Websites like Pinterest, Hallmark, and BrightlyMessages offer great collections of birthday wishes. Blogs and quote sites also provide plenty of ideas to personalize your message.

Unique happy birthday card messages for teachers

Try adding humor, a personal memory, or a heartfelt quote to make your message stand out. Avoid generic lines and speak from your own experience with them.

Apps for creating personalized teacher birthday wishes

Apps like Canva, Adobe Express, and Greetings Island let you design custom birthday cards easily. They offer templates you can personalize with photos and messages.

Conclusion

Teachers shape our lives in ways we often don’t notice until much later. A birthday wish is a small way to say thank you for all their hard work. It doesn’t need to be fancy to mean something.

Whether it’s a short message or a heartfelt note, what matters most is the thought behind it. Teachers remember the effort, not just the words. Even a simple “happy birthday” can bring a smile to their face.

So don’t wait for the perfect moment or the perfect words. Pick a wish that feels right to you and share it today. Your teacher will appreciate it more than you know.