Working pattern changes take effect immediately.
If you have changed an employee's working pattern but this is not reflected on their profile, the issue may be with the working pattern history and overlapping dates.
To resolve this:
Search for the employee and go to their profile.
Click Employment, then Working Pattern.
Click Edit.
Under Working Pattern History you will see a log of all working patterns that have been assigned to this employee and their start and end dates.
Click each line, then click Delete.
When you've removed all lines, click Add Working Pattern History.
Enter the start date of the pattern and select the template.
Click Save.