Both of mine were born around 5.45-6pm so we called people within an hour. We only called my parents and dp's parents and siblings, everyone else got a text that I sent out just after we'd spoken to people on the phone. Actually, with ds I didn't text ppl till the next day because we.hadn't settled On a middle name!

if they'd been born in the middle of the night we pron would have.called immediate family (well, parents) but def wouldn't have texted till the morning. I'm lucky that my phone is usually at the other end of the house - I've woken up to a few text message announcing births