1.Work out when it is, and whether it already happened
Take the day of the month they were born. That is the age. Born on the 3rd, it was at three; born on the 28th, it is at twenty eight. Anyone born from the 1st to the 15th had theirs as a child, which means a fair share of adults planning one for a friend are planning something that happened during a school year nobody remembers. Check before you buy balloons with the wrong number.



