https://docs.google.com/spreadsheets/d/11O3eWzuvwO4qeXbciVoibhR2ZRwIIEXqizOqcs8rqoI/edit?usp=sharing

this is what i've got so far but its missing some months and not hiding the 30 & 31 days of the month.

,,,,

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function hideDates()
{
  var ss = SpreadsheetApp.getActiveSpreadsheet();
    var s = ss.getSheetByName("UI Data");
    var v = s.getRange("C:C").getValues();
    for (var i = s.getLastRow(); i > 2; i--) 
    {
        var t = v[i - 0];
        if (t != "") 
        {
            var u = new Date(t);
            var dateToday = 1;
            var  testDate = u.getDate();
            if (t >"")
            if (dateToday != testDate)
            {
                s.hideRows(i);
            }
        }
    }
}

CodePudding user response：

In your Spreadsheet, it seems that the value of column "C" is like 01/02/2022 00:00:00. If this format is constant, as a simple method, how about retrieving the values as the string value? When this is reflected in your script, it becomes as follows.

Modified script:

function hideDates() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var s = ss.getSheetByName("UI Data");
  var v = s.getRange("C:C").getDisplayValues();
  v.forEach(([c], i) => {
    if (Number(c.split("/")[0]) != 1) {
      s.hideRows(i   1);
    }
  });
}

• In this modification, the value like 01/02/2022 00:00:00 is retrieved as the string value, and 01 is retrieved as the number, and then, hideRows is run by comparing it with 1.

Reference:

• getDisplayValues()