Today I wrote a very simple utility to obtain statistics on the AID, and one of the functions I added was a check to see who has an observing anniversary today. Given that I've been wrapping up a CHOICE course for the AAVSO, I found it both gratifying and fun that the earliest observations currently in the AID from Carolyn Hurless, HR, are dated April 16, 1959. She observed R Leo, T UMa, R Vir, RS UMa, S UMa, and S CrB for the first time (on record) 54 years ago today. I also noted that Paul Temple, TPV, also had an AAVSO anniversary today. He started his AAVSO observing career with an observation of Z UMa on April 16, 1996.
As I write this is technically the 17th, and rerunning my utility now shows me a new set of names. One current observer has their twentieth observing anniversary today -- Adolfo Darriba Martinez' (DAM) first observation in our archives was of supernova 1993J, and is dated April 17, 1993. And there's another famous name from the past as well: Joseph Ashbrook's (AS) earliest observations in the AID are dated April 17, 1936, and are of alpha Her and kappa Oph.
Happy anniversary to everyone, and many thanks as well!