Currently waiting for a new date/ time for 2nd Pfizer shot. I (and many coworkers) had our first shot as soon as were eligible as Front Line workers. My first dose was Monday, March 1st with the second one scheduled for Monday, April 5th.
Other colleagues who went a week or so later had their second dose scheduled further out; some time in late June or early July.
Late last week, those of us with the earlier second doses received eMails cancelling those appointments with no new dates listed
For what it's worth, I'm in Ontario, Canada.