Hi @Anonymous ,
Do you want to filter your Gallery items (use SP Calendar list as data source) based on the Date range you selected from your Calendar?
I have made a test on my side, please take a try with the following workaround:
Set the Items property of the Gallery to following:
Filter(
'YourCalendarList',
'Start Time' >= _selectionStart,
'End Time' <= _selectionEnd
)
Or
Filter(
'YourCalendarList',
Value(Text('Start Time', "[$-en-US]yyyymmdd")) >= Value(Text(_selectionStart, "[$-en-US]yyyymmdd")),
Value(Text('End Time',"[$-en-US]yyyymmdd")) <= Value(Text(_selectionEnd, "[$-en-US]yyyymmdd"))
)
Please take a try with above solution, then check if the issue is solved.
More details about Filter function in PowerApps, please check the following article:
Filter function
Best regards,