Any ideas that can restrict all events will not have any overlap?
(e.g. Once 9:00 - 10:00 is occupied, new events cannot be created in this or overlap this period.)
Please help. Thanks to all professions! 
Any ideas that can restrict all events will not have any overlap?
(e.g. Once 9:00 - 10:00 is occupied, new events cannot be created in this or overlap this period.)
Please help. Thanks to all professions!