An event every year that begins at 00:00 on day 17 of July, repeating indefinitely
When:
📅
Where: Everywhere
First occurrence: 2014
created by
Emojipedia founder Jeremy Burge in 2014.
July 17, 2002, was the day that iCal for MacOS was announced.
Therefore the icon for ICal was a calendar with this date on it.
So that is how when Apple made their line of emoji’s,
they included this icon for their calendar emoji.
Other emoji fonts copied this date because….well, they just did.