i would always put the earlier time - i think 1230 is ok because
that is actually the time you want people to be there in order to make
it to the ceremony venue in time. alternatively saying ceremony at 1
but please arrive at 1230 is an option, but then closer to the time if
ppl recheck the invite they might not look at all the fine print and
just see 1. wouldn't want people turning up at say 5 to 1 and throwing
it all off schedule?
and LauraJane, i would put 1.45pm because that is when you want
them there. no point taking a risk, people won't mind coming in 15
minutes earlier and milling about or finding their seats etc.
dont
forget people probably wont have been to these venues before so they
also need time to find the right room, drop off coats/presents and say
hi to ppl... anyway those are my views xx