August 1.
To celebrate Jerry’s birthday, let’s go ahead and give a choice. The Grateful Dead only played 4 times on Garcia’s birthday. Only three are on the Archive:
1973
https://archive.org/details/gd73-08-01.aud.weiner.gdADT08.9145.sbeok.shnf
1982, at the Zoo in Oklahoma. (DSO played the Zoo in Minnesota.)
https://archive.org/details/gd82-08-01.sbd.willy.10226.sbeok.shnf
1994
The show in 1967 doesn’t have a setlist and is not on the Archive.
There are shows on July 31, and some the first week of August, but it seems evident that, for the most part, Jerry preferred to not be playing on his birthday. Speculation on my part, but it does seem to be a trend.
I went to the Detroit show in 1994, Jerry’s 52nd. The show didn’t start until Stagger Lee, when the volume got turned WAY up mid-song (wtf, Cutler?). Music was good.
Set 2 of that show was very strong.
VOTC
Scarlet
Fire (only Scarlet/Fire of Summer Tour)
Samba
Estimated Prophet
Drums/Space
Watchtower
Stella Blue (very emotive)
Satisfaction (hot)
E: Liberty
https://archive.org/details/gd94-08-01.set2-sbd.georges.1026.sbeok.shnf