Back in March, during baseball’s hiatus due to COVID-19 shutdowns, I was sent this video.
Well. That’s obviously Wrigley Field, before and during a game (with a second or two at the end, video of a building that looks like the Illinois state capitol in Springfield).
It’s nearly impossible to read the scoreboard, so that’s no help. The ivy is fully grown in, so it’s not April or early May.
And there’s a ceremony of some kind happening on the field. It took me a while to find this, but this appears to be the ceremony in question:
In June of 1966, I took my oath to join the service standing on the 3rd Base Line in Chicago Cubs Wrigley Field Ball Park.