I grew up in the 90s and I remember being able to truncate the year down to just 2 numbers when talking about years within the current millennium. It seems like we’re still saying twenty before every year and I’m just wondering when that will change.
Context is everything.
“When are you guys coming over?”
“We were thinking 20th, but I couldn’t get off work then, so 21st it is.”
If you’re in that conversation, you’d be perfectly clear of what’s up. Imagine having to append “of December” to both dates (or also the year for that matter).
If it’s something more than a year ahead, then sure, I’ll include the month and the year - but that’s still going from most specific to least specific (i.e. day, month, year).