I created a schedule of events in Google Sheets.

  • I have a cell that contains MWF, indicating that the event is every Monday, Wednesday, and Friday.
  • I have a different cell that reports the word Monday.

I'd like to determine if my two events overlap.

In other words, I need to determine if Monday from the 2nd cell is included in MWF from the first cell.

  • In this case, the result I want would report TRUE, while an alternative scenario in which the 2nd cell contained Thursday would instead report FALSE when comparing to MWF.

Visual example:

enter image description here

Is there a way I can do this without adding a separate region of a spreadsheet to define these letters?

  • Ex: I don't want to add a column with M, T, W, H, F and another adjacent column containing "definitions" (i.e., Monday, Tuesday, Wednesday, Thursday, Friday) to refer back to.

1 Answer 1


you can try something like: =ISNUMBER(SEARCH(LEFT(B1; 1); A1))


above formula wasn't smart enough, but this one is:

=IF(LEFT(B1; 2)="Mo"; ISNUMBER(SEARCH(LEFT(B1; 1); A1)); 
 IF(LEFT(B1; 2)="Tu"; ISNUMBER(SEARCH(LEFT(B1; 1); A1)); 
 IF(LEFT(B1; 2)="We"; ISNUMBER(SEARCH(LEFT(B1; 1); A1)); 
 IF(LEFT(B1; 2)="Th"; ISNUMBER(SEARCH(RIGHT(LEFT(B1; 2); 1); A1)); 
 IF(LEFT(B1; 2)="Fr"; ISNUMBER(SEARCH(LEFT(B1; 1); A1)); 
 IF(LEFT(B1; 2)="Sa"; ISNUMBER(SEARCH(LEFT(B1; 1); A1)); 
 IF(LEFT(B1; 2)="Su"; ISNUMBER(SEARCH(RIGHT(LEFT(B1; 2); 1); A1)); )))))))


Monday     =   M
Tuesday    =   T
Wednesday  =   W
Thursday   =   H
Friday     =   F
Saturday   =   S
Sunday     =   U


 REGEXREPLACE(IF(SPLIT(REGEXREPLACE(A1:A, "([A-Z])", " $1"), " ")="", "♦", 
 SPLIT(REGEXREPLACE(A1:A, "([A-Z])", " $1"), " ")), "..", "♦"))}),,999^99)), "T"), ))


  • Thank you. This works for my example, but unfortunately won't work if I instead need to include both Tuesday and Thursday (or both Saturday and Sunday). Any thoughts about how I could approach this without relying on first letters (since some days share first letters)... Commented Sep 4, 2018 at 18:45
  • @theforestecologist thats the reason why I said "a lot of unknowns". how are you getting MWF and Monday? both by formula? or its just typed text?
    – user0
    Commented Sep 4, 2018 at 18:49
  • MWF and Monday would both be types as text. The unknown function would compare them. a second example that captures the issue of Tuesday/Thursday would, perhaps be, TuTh or TH instead of MWF... Commented Sep 4, 2018 at 19:00
  • 1
    thanks for adding the more detailed solution, user0! Commented Sep 4, 2018 at 19:46

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