fix today

Author: kangzj

client/my-sites/stats/hooks/use-moment-site-zone.ts

@@ -4,6 +4,7 @@ import moment from 'moment';
 import { useSelector } from 'calypso/state';
 import { getSiteOption } from 'calypso/state/sites/selectors';
 import { getSelectedSiteId } from 'calypso/state/ui/selectors';
+import { DATE_FORMAT } from '../constants';
 
 export const getMomentSiteZone = createSelector(
 	( state: object, siteId: number | null ) => {
@@ -16,7 +17,9 @@ export const getMomentSiteZone = createSelector(
 
 		const gmtOffset = getSiteOption( state, siteId, 'gmt_offset' ) as number;
 		if ( Number.isFinite( gmtOffset ) ) {
-			return localizedMoment.utcOffset( gmtOffset );
+			// In all the components, `moment` is directly used, which defaults to the browser's local timezone.
+			// As a result, we need to convert the moment object to the site's timezone for easier comparison like `isSame`.
+			return moment( localizedMoment.utcOffset( gmtOffset ).format( DATE_FORMAT ) );
 		}
 
 		// Falls back to the browser's local timezone if no GMT offset is found