October 23, 2008
I turn 32 today. 6:57 AM if you go by the time on my birth certificate, or 7:57 AM if you prefer to use my "true" birth time of 11:57 AM UTC. (Daylight Saving Time wasn't in effect this time of the year in 1976. It creates an utterly unimportant question of the exact time my birthday starts. If you even bother to assume that time zones matter.)
Thirty-two isn't a particularly important birthday -- though it would be better than the alternative -- but it is the last time my age will be a power of two until 2040. And just for the sake of completeness:
25: 32, Now.
26: 64, on 10/23/2040.
34: 81, on 10/23/2057.
43: 64, on 10/23/2040.
53: 125, on 10/23/2101. Not banking on making it that far.
62: 36, on 10/23/2012.
72: 49, on 10/23/2025.
82: 64, on 10/23/2040.
92: 81, on 10/23/2057.
102: 100, on 10/23/2076. Another one that isn't likely.