I read some postings here earlier where some were saying they had never heard of meetings staring at 7pm. I may have misunderstood.
Were/are there different start times elsewhere?
Our times in UK were
Tuesday 7pm-8pm Group Study
Thursday 7pm -9pm Kingdom Ministry School and Service Meeting
Sunday 10am -12pm Public Talk and Watchtower Study
When two congregations shared a hall then the Tuesday and Thursday would swap and the Sunday would be 2pm - 4pm