How-to · Updated October 11, 2026
Match your GA4 time zone to Google Ads
Updated October 11, 2026
5 minutes
Change the GA4 property's reporting time zone to the Google Ads account's, never the other way: Google no longer lets a standard Ads account change its time zone. Match the region and its daylight saving rule, not only today's offset. The change applies from that day on, so one day in GA4 trends may look uneven.
Before you start
- The Editor role or above on the GA4 property, to edit its settings.
- Access to the Google Ads account, to read its time zone.
- A date to make the change. Google says not to change a property's time zone more than once a day, and the change day itself may look uneven in reports.
Compare the two time zones
Read both time zones first: the fix depends on whether the two tools start a new day at the same moment.
- In Google Ads, find the account's time zone in its account settings and write down the region or city it names, not only the offset.
- In GA4, click Admin. Under Property, click Property details and read Reporting time zone.
- If both name the same region and follow the same daylight saving rule, the time zone is not why the days differ; skip to the last part. If they differ, even by a zone with the same standard offset, change GA4. Analytics adjusts for daylight saving time when the chosen zone observes it, so two zones that share an offset only part of the year drift an hour apart for the rest.
Change GA4 to match
GA4 is the side that can change, so it moves to meet Google Ads.
- In Property details, change Reporting time zone to the zone Google Ads uses. The two lists may word the same zone differently, so match on the region and whether it observes daylight saving time, not on the exact name.
- Click Save.
- Write down the date. Google says the change affects data from then on only, and a property moved forward or back may show a flat spot or a spike around that day.
Google Ads time zones are set when the account is created. Moving one means a new account, which starts with no history, so matching GA4 to Ads is almost always the better fix.
Compare by the same date
With matching time zones, one difference in dates remains: which day each tool files a conversion under.
- In Google Ads, add the Conversions (by conv. time) or All conv. (by conv. time) column to the report you compare. Google says the standard conversion columns file a conversion under the date of the ad click, while other tools such as GA4 use the date of the conversion.
- Compare a single day only after both tools have processed it. Google says GA4 processing can take 24 to 48 hours, and the figures may change until then.
Check it worked
Property details should now show the new Reporting time zone. Google says reports may use the old zone for a short time until the change is processed.
A few days later, take a day after the change and compare a lead count in both tools using the by conversion time column. Leads that arrive near midnight should now land on the same date in each.
The Google Ads account is in the wrong time zone
Google says time zone changes are no longer supported in standard accounts; the only route is a new account with the right zone, and campaigns copied into it bring no history. A manager account can have its zone reset once, only eastward, at an Admin user's request. The time zone does not change where ads can show, but Google calls it crucial for reporting, campaign scheduling and billing, so a new account in another zone moves any ad schedule with it.
Billing still shows Pacific time
Whatever the account's time zone, Google shows everything on its billing pages in Pacific time, so a charge can sit on a different date there than in your reports.
Over a month the totals barely move
A time zone gap moves only the conversions that happen within as many hours of midnight as the gap, so over a whole month it shifts a few from one month into the next at each end. It matters most when you compare single days or a short campaign test.