I used to believe…
1972 was a leap year. My sister told me that meant February had a "29th" but some years didn't have the last day of February.
Did this happen to other months? I was so scared that maybe July would sometimes drop its last day, and I wouldn't get my birthday. No birthday presents! Horrors!
Lucky for me, I did in fact get to turn 3 that year. Phew!
