Hey everyone,
So when you aren't sure about the precise date that something happened but you know it took place within a certain decade, like 1997, you put it - "in the 90s" or "in the late 90s".
I'm guessing there has to be an analogy as to indicating a date within a month. For instance, I know my friend left for Canada in May, but it could be any day within May 20-31 timeframe. Now anything I've come up with sounds really wrong

(In the 20s of May? God...)
Can someone please put me out of my misery?
Any help appreciated!