Mine was before the first lockdown but I still haven't actually had my present as we didn't get chance to organise the date, and then by the time restrictions eased and no masks would be required it was 18m later.
My next one was in the 2021 lockdown. Fortunately the weather was nice so we went for a 10k walk, I played in a playground and had a zoom party. It was a big birthday and the best of a crap job.
While I'd got away with not having a lockdown birthday in 2020, the tension was already brewing and we'd hit first anniversaries mode of the Covid shit developing, so that was a bit depressing.
DS1 is around Christmas. I broke the tier 3 rules by letting his best friend come round for a couple of hours. They'd been at school together the previous day so it made no difference.
DS2 has come off worst, 1st half of April.
2020, it was a good job I went shopping on 16th March because online deliveries went crazy and nothing could be delivered for weeks. I remembering some "non-essential" learning workbooks with an estimated delivery of 6 weeks.
We went to the Co-op to buy popcorn, "treated" him to a "cinema afternoon" (sitting in our bed watching films) and had a takeaway.
He got luckier in 2021 as it timed with initial relaxing of restrictions so we booked to go to the farm which was pretty exciting in the grand scheme of things. Seeing friends still wasn't viable (whatever the rules were on that) because once again lockdown had stolen his social confidence while he was stuck at home in a two-tier education system and he'd lost his friends again.
After being prohibited from having a 7th or 8th birthday party, he did get to invite some friends to DS1's party in recompense for the promise I made about having a party when it was over... I thought it would be later in the spring of 2020 🤦♀️
DH is a jammy summer born. Even then, he's struggled to find friends to celebrate with without them interpreting it as a death threat, but at least we could go on holiday (2020) or do an outdoor sports activity (2021)