I would call everyone the next day.. let the whole day be about us as a couple instead of us/everyone else
but that's just me
my best friends/parents would get a call..everyone else could find out on facebook/engagement announcements within the week via email or snail mail. and when I say facebook I mean a text update or a picture of us together..NOT BY me posting a picture of just my hand with the ring. ugh just NO. such a pet peeve of mine.