Click the drop-down arrow and select a date from the calendar; if you want to add the current date, click the Today button. If you want to move from each month in the calendar, click the Next ...

Google Calendar has made a small tweak by adding a current date indicator to the interface. The update is currently rolling out on Android but has not yet reached the iOS version. While the ...

Click OK. This property changes the Calendar color, not the selected day, so it's a big change. You'll want to choose a color that contrasts with the current day's border, as shown above.