为什么Google表格中的日期验证会拒绝今天上午8:00之前的日期？

Question

I've created a Google sheet to keep a list of work tasks with a column to track the date on which items are created, and built a script to automatically populate the cells in that column with the day's date when a new line is inserted.

The cell (eg G9) that is target of the script uses the following validation formula to make sure that when users change the date, they use a date that is neither a weekend nor in the future:

=and(isdate(G9), weekday(G9,2)<6, G9<=today())

IT ONLY WORKS BUT ONLY IF THE SCRIPT IS RUN ANYTIME AFTER 8:00am ! If I try using it any earlier the cell validation will reject the input!

The script looks like this (curRow is the number of the row that's been added):

 // Adds today's date without using =today()
  var myrangename = "G"+curRow;
  var dateCell = sheet.getRange(myrangename);
  var d = new Date();
  var dateArr = [];
  dateArr[0]=d.getFullYear();
  dateArr[1]=d.getMonth() + 1; //Months are zero based
  dateArr[2]=d.getDate();
  dateCell.setValue(dateArr.join('/'));

(nb: I cannot use the script to simply put =today() in the cell because all the entries would change every day. )

WHY DOES IT ONLY WORK AFTER 8:00AM? Is Google somehow running on a different time zone than my computer?? I'm based in the UK, so using BST , but that shouldn't be a problem, shouldn't it...?

Answer 1

Try

var d = new Date();
var d = Utilities.formatDate(d, "GMT+1", "yyyy-MM-dd HH:mm:ss");

I am not sure if google would recognise BST as a time zone, but you could also try

var d = Utilities.formatDate(d, "BST", "yyyy-MM-dd HH:mm:ss");

Answer 2

Thank you for your suggestion, Aprillion. Turns out that which in my case was set to American Pacific time (so 8hrs behind)
(You'd think it would pick up the date and time info automatically from Windows, like other applications do!)
To set the sheet's time-zone to the correct one, you need to go to the main menu, click 'File', then 'Spreadsheet settings...', and adjust as necessary.
The script and validation now all work fine.
Thank you all for your help.