The tournament traditionally took place over two weeks in late June and early July, starting on the last Monday in June and culminating with the Ladies' and Gentlemen's Singles Finals, scheduled for the Saturday and Sunday at the end of the second week. However recent changes to the tennis calendar have seen the event moved back by a week to begin in early July. Five major events are held each year, with additional junior and invitational competitions also taking place.

Is it true that did wimbledon tennis used to be in june?
yes