PC/NA.
Logged on tonight (March 20) to get stuff from my hirelings. This is on my master crafter, so top level materials.
All four mails say the following:
"Received 1657 months ago
Expires in 30 days"
If I alt-tab out and back, that changes to "Received 1 minute ago".
Absolutely no problem getting the mats/deleting the mail, but the initial date read is...I mean, 1657 months ago would be February 1880, what? Barring reincarnation and all that sort of thing, I highly doubt either this game or my illustrious self were around back then.