Lots, Tiggs. My group of eight friends celebrate birthdays with 0 and 5 in a big way. Most of us hit 70 last year so those are on hold. Lots of visits from the UK to our new home were cancelled. Most of the family, including me, missed mum's funeral. She had left strict instructions for a big send off.
In truth it's not so much the big occasions that I miss. It's just seeing the children and grandchildren...days out with the daughter or just an evening in garden chatting with them over a bottle of wine.
Still, outdoor dining is arriving here in a couple of weeks so we've got the macs, wellies and brollies ready... :-)