For some reason, once people find their way to Torah, they fall under the erroneous impression that birthdays are “pagan”. Nothing could be further from the truth!
Birthdays are simply a commemoration of the day YHWH chose to give us life. There is nothing wrong with celebrating that, and nowhere does Scripture prohibit the celebration of birthdays.
As a matter of fact, check this out:
Psalm 27:4 "One thing I ask from the LORD, this only do I seek: that I may dwell in the house of the LORD all the days of my life…” The days you dwell with the LORD begin on your birthday.
Proverbs 9:11 "For through wisdom your days will be many, and years will be added to your life" … Years are counted from the day of your birth!
Psalm 90:12 "Teach us to number our days, that we may gain a heart of wisdom" … We number our days from the day of our birth.
We could go on, but surely, you get the gist: There's nothing wrong with celebrating the anniversary of the day we were born, as long as we remember to use some common sense and not “go overboard” by going into debt, etc.
The main thing to keep in mind is that it's not “about us” but all about YHWH. He should be in the middle of EVERYTHING in our life - and if He isn't, then we need to do a 'reset' and get re-centered.