title: Locking cells in Google Sheets at a specific time
body: <p>I want to code my Google Sheets cells in a way that certain cells automatically lock at a specific time every day. I should be able to edit it, but not my collaborators.</p>
  
  <p>How do I pull this off?</p>
  
  <p>In the sample sheet (<strike><a href="https://docs.google.com/spreadsheets/d/1Az51IGA-OOt6ML6KMOzlVT8QwoFe5nhzH7yK26sQFG8/edit?usp=sharing" rel="nofollow noreferrer">link here</a></strike>), you will see certain dates (15/7/2015-17/7/2015). I want to code it so that each date (eg <code>A1:B6</code>) is locked daily, 10 pm.</p>