Even though I had my birthday April 9, it wasn't official until my Big Sister's birthday, too.
This, of course, reminds me of my dear friends, Betsy, Tacy, and Tib.
As explained in Maud Hart Lovelace's Betsy Tacy Go Over the Big Hill, Tib turned 10 in January, followed by Tacy in March ... but they were too polite to say anything until Betsy's April birthday.
Oh, Betsy’s ten tomorrow
and then all of us are ten!
We will all be ten tomorrow,
We will all be ladies then.
Happy, happy birthday!