title: How to retrieve time of last edit
body: <p>I have a Google Sheets that updates automatically throughout every day but sometimes gets stopped up. I want to store and update the time and date of the last time any cell in the first column is changed in a single cell.</p>
  
  <p>For example: <br>
  1. I open a sheet. <br>
  2. The sheet automatically pulls and updates a .csv file from a server.<br>
  3. The cells are regenerated and updated. <br>
  4. When any cell in the first column is changed<br> 
  5. Update the time of the last edit in a cell of another sheet.       </p>