Phil Perkins Photography

Birthday Weekday

It was 5:20 a.m. and I was finishing my second cup of coffee when it dawned on me – the question:

How many birthdays have I had on the same day of the week as my date of birth?

In resolution, using this weekday calendar, I laboriously set about to record the years in which I had a birthday on the Sabbath, being born on a Sunday.

Granted, this number of same days of the week may be of minimal interest, yet I did observe a pattern. So, I checked a few other sample birthdates to substantiate the following conclusion:

With the exception of February 29th, every birthdate, on any given day of the week, recurs on that day of the week in accordance with the following pattern of years…

↱ 6 · 11 · 6 · 5 ↲

So, if your birthday on the same day of the week as your date of birth initially occurs at age 11, it then recurs at intervals of 6, 5, 6 and 11 years, as a repeating loop.

Also, if by chance you happened to be born in a leap year on February 29th, your next calendar birthday of February 29th – on the same day of the week as your birthdate – will occur in a cycle every 28 years.

You may say that I’ve got too much time on my hands, but cut me some slack – and cake – as today is my birthday. Happy birthday, me!


62 responses to “Birthday Weekday”

    1. Phil Avatar

      Thank you 😊

        1. Phil Avatar

          Thank you for the fine pastries, dear Silvia 😙🌹

  1. marina kanavaki Avatar

    Happy Birthday, my friend! Enjoy to the fullest! I may be biased but isn’t March the greatest birth month… spring child?! 😉

    1. Phil Avatar

      Thanks very much, dear Marina 🤗🌹🍀

        1. Phil Avatar

          Cheers my friend 🥳🥂😙🌹

  2. Louise Salmone Avatar

    Et joyeux anniversaire à vous !!! 🙂 And happy birthday to you!!! 🙂

    1. Phil Avatar

      Thank you, dear Louise 🙂

  3. junymond Avatar

    I think you have too much time. I can only tell you, I was born on a Saturday and this year I also had Birthday on a Saturday. As always, I had the flu 😂😂 This Year it was special ,not a usually a flu, but corona. Are you born in the morning?

    1. Phil Avatar

      Vielen Dank, Nicole ~ du bist süß 😙🌹 Ja, morgens geboren. Habt einen schönen Tag, meine Liebe!

  4. wanderlustig Avatar

    Happy Birthday and all the best 🍀🎉.

    1. Phil Avatar
  5. Balle Avatar

    Dear Phil, I love that you did the math. I think the little boy in the picture is very cute with a beautiful smile.
    Happy Birthday and all the best 🎉🥂🍾🎂🎊 Stay healthy and sound 🎈 Wish you, Balle 🎉💖🥂

    1. Phil Avatar

      You are very kind, my dear friend Balle ~ thank you! Yes, this is me at 1 year old…my first cake! I appreciate your visit and wish you a wonderful day! 🎉💖🥂

        1. Phil Avatar

          Cheers, my dear 🥂

  6. Carla Milho Avatar

    Happy birthday my dear friend
    I wish you all the best in your life 🎉🎊

    1. Phil Avatar

      Thank you, dearest Carla ❤️ I truly appreciate your kind words, and seeing your lovely face here is a very wonderful treat for me! 🌹😊🤗 God bless you, my friend 🙏🏻

      1. Carla Milho Avatar

        You are most welcome my friend 🌹🙏

  7. Shruthi Senthilkumar Avatar
    1. Phil Avatar

      Thanks Shruthi 👍

  8. ellie894 Avatar

    Happy Birthday, Phil! ✨🎶
    And, that is some pretty cool stuff about birthdays and the days they fall on ☺️

    1. Phil Avatar

      Thanks very much, Ellie 🙂

    1. Phil Avatar

      Thank you 🙂

  9. Maja Avatar

    Happy birthday Phil! 🥳

    1. Phil Avatar

      Thanks very much, dear Maja 🤗🌹

  10. balladeer Avatar

    Interesting tidbit! And happy birthday!

    1. Phil Avatar

      Thank you 👍

  11. Kristallina Avatar

    Happy Birthday, Phil! Love and health to you!

    1. Phil Avatar

      Thanks very much, dear Kristallina 🙂

  12. Inge David Avatar

    Een fijne en gelukkige verjaardag toe gewenst!
    Dat er nog vele goede en gezonde jaren mogen volgen!
    Happy birthday Phil! 😘

    1. Phil Avatar

      Thanks very much, dear Inge! 😘

  13. Michele Lee Avatar

    Happy Birthday, photographer Phil! 🥳 Your photo is adorable! 👼🏻 The cake is original. 🎂😆 You may have too much time on your hands, or you might consider teaching math. 🤔 Enjoy your birthday week! 🌞🌄

    1. Phil Avatar

      Thank you, lovely poetess Michele! 🌹 I was certainly excited about this thing they call ‘cake’. 🤪 Yes, perhaps too much coffee too early. ☕☕ Will do, my friend ~ have a great day! 🌞✍🏼 Oh, BTW, I love your Walk with me poem & photography. ✅

      1. Michele Lee Avatar

        You are welcome birthday boy. Yeah, cake is exciting, then and now. 😆 haha Well, not a bad way to start the day… solving a birthday math riddle. Now we know! 🤯 Thank you for mentioning that poem and photos. I wasn’t able to comment for a few days, but I wanted to share the photos, then the poem spilled out. Thanks for the feedback. 🙏🏻🌞

        1. Phil Avatar

          It’s my pleasure, Michele. 🙏🏻🌞

  14. Carolyn Kaiser Harmon Avatar

    Wishing you the best birthday ever, Phil. Thank you for doing all of that computation for everyone. I never would have tried <3.

    1. Phil Avatar

      Thank you, dear Carolyn ~ have a great day! 😊🌹

  15. Cindy Georgakas Avatar

    love you did that math and look at that adorable little boy all grown up and still adorable. Happy birthday thanks for doing the math on my next Leap Year Birthday! Until then I remain 16 1/4 💖🌻🌻🙏🌈

    1. Phil Avatar

      Thanks very much, dear Cindy 💖🌻 I appreciate your kind words, and always thought it would be cool to have a birthday on Feb. 29th. 😎 So, the question: on birthdays not during a leap year, do you celebrate on Feb. 28th, March 1st, or both days? 🎂🥳 Have a great day, my friend!

      1. Cindy Georgakas Avatar

        YOU’RE SOOO WELCOME! Absolutely and hope you are having fun. I love the birthday. 2 of my friends celebrate on the 28th. I celebrate all month…. hahahah. but more think of it on the 1rst cuz it hasn’t come yet on the 28th. thanks and hugs … keep enjoying!!💖💖💖🌻

        1. Phil Avatar

          Ah, I see ~ very good, Cindy! Big 🤗🤗🤗 back atcha, my dear 💖 TY

          1. Cindy Georgakas Avatar

            💖💖🌻 Have a great day.

  16. travelling_han Avatar

    Happy Birthday Phil 🙂 And also that is pretty interesting on the day of the week!

    1. Phil Avatar

      Thanks very much, dear Hannah 🤗 Yes, I thought that was an interesting pattern to stumble upon💡 Have a great day, my friend!

  17. tiffanyarpdaleo Avatar

    Interesting numerology, Phil! Have a wonderful, happy birthday my friend!

    1. Phil Avatar

      Thank you dear Tiffany 🤗

  18. Annabel Avatar

    Happy birthday to Phil! 🥳🥂loved the pictures and You were a certified cutie pie !! 😃🤩 stay charming forever!🥳🎊

    1. Phil Avatar

      I welcome your kind words this morning, dear Annabel, and your lovely smile is a pleasure to behold! 😘 Thank you for the happy birthday wishes! 🥳🥂

      1. Annabel Avatar

        I hope you get a delicious homemade cake 🎂 that day with much blessings and love!! 🥳🎊 🍰

        1. Phil Avatar

          Ah, thank you dear Annabel. 🤗 Indeed, cake is good, though I think that your comments are much sweeter!❣️✨🎂🥳

          1. Annabel Avatar

            Haha! What a sensible gentleman, Phil! 😃👍

            1. Phil Avatar

              Have a lovely evening, lovely Annabel! 🥳🥂 xoxoxo

  19. Mike Ross Avatar
    Mike Ross

    Happy Birthday Phil!

    1. Phil Avatar

      Thanks Mike 👍

  20. Robin King Avatar

    Awwww…🎂…Hoping it was happy!! Adorable picture! And the pattern info is fascinating. 🥰👋

    1. Phil Avatar

      Thank you, my friend 😃 I had a nice day (hiking), and also thought that the pattern of numbers was interesting 🤔 Have a pleasant evening, Robin! 💐

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