Data validation

[safoine]

Hello please I want to make condition on cases. if today date superior then the fixed date then i can't modify them but the formula won't work please the solution 

[#2 · Accepted solution]

@safoine 

Use

=TODAY()<DATE(2022,1,1)

Warning: users will still be able to copy/paste into the cells!

[#3]

i locked the sheet with password too