Time change to 23:00 when creating weekly repeated event

## What Happened
Creating an event to repeat weekly causes the time to change to 23:00. The time cannot be updated after that. It stays at 23:00.

## Expected Behavior
I want to create an event that repeats every Thursday at 19:00 and send me an alarm 1 minute before 19:00.

## Steps to Reproduce
1. Double click on date in calendar app to create an event.
2. Input name of event and select time to be 19:00.
3. Select weekly and Thursday in repeat tab.
4. Select alarm to be 1 minute before event.
5. After the event is created, the time of every instance is changed to 23:00 instead of 19:00.
6. The time cannot be updated back to 19:00. It stays at 23:00.

## Platform Information
+ **Calendar App**
+ Version 6.0.1

+ **Operating System**
+ elementary OS 6 Odin
+ Ubuntu 20.04.3 LTS
+ Linux 5.11.0-34-generic

+ **Hardware**
+ Inspiron-5559
+ Dual-Core Intel® Core™ i7-6500U CPU @ 2.50GHz
+ Intel® HD Graphics 520 (Skylake GT2)