A “year” is the time our Earth takes to go all the way around our Sun – and then you get another birthday. But some planets are much speedier than Earth. Kepler-78b goes around its sun in just 8 hours! That’s right: 8 hours from now everyone there will turn 1 “year” older. Actually, no one lives there, because the temperature is over 3000 degrees. Makes it hard to serve ice cream cake!

*Wee ones:* If you’re going to have 3 birthdays today, what ages will you turn today? Count up 3 years from your age!

*Little kids:* If your 2nd “birthday” today is at 1 pm, at what time is your last one 8 hours later? *Bonus:* If you serve cake only on every 4^{th} birthday, including your middle one today, at which birthday will you serve cake again? (Just the day and first/middle/last, not the time).

*Big kids:* If your 1^{st} birthday was today at 7 am, at what time was your last birthday yesterday? *Bonus:* If you get 3 birthdays a day, how old will you be 1 Earth week from now?

Answers:

*Wee ones:* Different for everyone…count up the next 3 numbers from your age today!

*Little kids:* At 9 pm. *Bonus:* At your last birthday tomorrow.

*Big kids:* At 11 pm (since midnight was just 7 hours earlier). *Bonus:* Different for everyone…add 21 to your age!