This is possibly a bit off topic, but still, it's about plants....

I'm trying to approximately date some old photographs, I know they're
from 1966 and they're of places in Norfolk. I had them labelled as
"Easter" which in 1966 was on April 10th. However the trees have no
leaves at all that I can see, is this likely in early April?

I realise things can change considerably between years but I'd like to
know if I'm way out or not.

--
Chris Green