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For my birthday is the most popular phrase on the web.

On my birthday 114,200,000 results on the web	For my birthday 117,200,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
On my birthday, when I said I would kiss everybody, it was in order to kiss you. I come here every year on my birthday. On my birthday Stephen told me I'd always look the same to him! If you tried that on my birthday... Something terrible always happens on my birthday. On my birthday, I wandered into the "over 30" room for a joke, sort of. We were married on my birthday. On my birthday, she just gave me an extra scoop of mashed potatoes.	karting. Look what dad got me for my birthday. For my birthday, I presume. For my birthday, you pulled a penny out of my ear. Claire gave me socks for my birthday. For my birthday, my Mum baked a cake, and Dad gave me a camera. For my birthday party this weekend, we're going go For my birthday, can I have driving lessons?

On my birthday

114,200,000 results on the web

For my birthday

117,200,000 results on the web

More popular!

On my birthday, when I said I would kiss everybody, it was in order to kiss you.
I come here every year on my birthday.
On my birthday Stephen told me I'd always look the same to him!
If you tried that on my birthday...
Something terrible always happens on my birthday.
On my birthday, I wandered into the "over 30" room for a joke, sort of.
We were married on my birthday.
On my birthday, she just gave me an extra scoop of mashed potatoes.