moving multible events at once on calendar, can i?

Hello all:
am using calendar to arrange my day meetings etc.
but the problem, is that sometimes my day as some problems and i started earlier or later, so if i should start at 11, i started @ 12 or 1, so all my meetings should be shifted by 1 or 2 hours, should i edit each meeting manually? or is there a quick solution for this?
am open to a mac solution also
Any help will be highly appreciated