I can understand why people want things to look forward to - and why businesses and people whose jobs will reopen would want dates in advance so they can plan.
But the dumbest thing the government could do is schedule reopenings before we know if it'll be safe to reopen.
That's what they did with the second lockdown - announced upfront that it was from to 31st October to 2nd December. Then they kept to their timetable and reopened things even though every metric on https://coronavirus.data.gov.uk/ made it clear we hadn't stopped the second wave - and now we have a third lockdown.