We once used to embrace a 13-month calendar, and some cultures still follow this format. So why are they 12 months instead of 13?

Social Security's payment schedule is normal in April, but recipients who get Supplemental Security Income benefits will get ...

SSI recipients get one check in April, but May and other months may bring two payments — or none at all — due to quirks in the calendar.

Eid, which means “festival” or “feast” in Arabic, is a celebratory occasion for more than one billion Muslims worldwide.