Google Calendar has just launched versions in 17 languages and today it has added two new small features.
One is moon phases, or the changes of the moon, which the ancients referred to as "the moon has its dark and bright sides, its waxing and waning";
Two is Google's holiday logos.
To get these two features, first log in to Google Calendar and click the small + sign for "Other Calendars" at the lower left corner.