Google-sheets – How to make Google Sheet jump to today’s column when opened

You can use the following script (see Tools > Script Editor). It executes whenever the spreadsheet is opened, and searches column A for the current date. It then sets the cursor to the cell with that date. You can use another column instead of A by editing the command sheet.getRange("A:A")

function onOpen() {
 var ss = SpreadsheetApp.getActiveSpreadsheet();
 var sheet = ss.getActiveSheet();
 var range = sheet.getRange("A:A");
 var values = range.getValues();  
 var day = 24*3600*1000;  
 var today = parseInt((new Date().setHours(0,0,0,0))/day);  
 var ssdate; 
 for (var i=0; i<values.length; i++) {
   try {
     ssdate = values[i][0].getTime()/day;
   }
   catch(e) {
   }
   if (ssdate && Math.floor(ssdate) == today) {
     sheet.setActiveRange(range.offset(i,0,1,1));
     break;
   }    
 }
}

This script borrows from this answer by Serge insas.

Unfortunately, it seems impossible to bind a script to the event of switching between sheets. So, if you'd like to invoke it on more than one sheet, you'll need to do this manually. The following version, in addition to doing what's described above, also adds a new menu item Custom > Jump to today's date, which you can use on any sheet. This also allows you to return to the date if you wandered off in the process of working with the sheet.

function onOpen() {
 var menu = [{name: "Jump to today's date", functionName: "jumpToDate"}];
 SpreadsheetApp.getActiveSpreadsheet().addMenu("Custom", menu);
 jumpToDate();
}

function jumpToDate() {
 var ss = SpreadsheetApp.getActiveSpreadsheet();
 var sheet = ss.getActiveSheet();
 var range = sheet.getRange("A:A");
 var values = range.getValues();  
 var day = 24*3600*1000;  
 var today = parseInt((new Date().setHours(0,0,0,0))/day);  
 var ssdate; 
 for (var i=0; i<values.length; i++) {
   try {
     ssdate = values[i][0].getTime()/day;
   }
   catch(e) {
   }
   if (ssdate && Math.floor(ssdate) == today) {
     sheet.setActiveRange(range.offset(i,0,1,1));
     break;
   }    
 }
}

Use this script, adjusting the sheet name and date format if necessary. It should be entered in Script Editor, found in Tools menu. After saving the script file, go to Resources > Current project's triggers, and create a trigger to run the function newColumn daily, at your preferred time.

function newColumn() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheetByName('Sheet1');
  sheet.insertColumnAfter(1);
  sheet.getRange("B1").setValue(new Date()).setNumberFormat('M/d/yyyy');
}