It has been used by historians since its introduction in 1583 to convert between different calendars.

Of course, believers are far from successful in marching to the beat of their different calendar.

Many charter schools offer a longer school day or operate on a different calendar.

There are only 14 different calendars when Easter Sunday is not involved.

The term sometimes is used instead for a proposal to switch to a different calendar.

The book seems to include interest in a solar calendar different from the lunar calendar that most Jews used.

Polytechnics and universities operate on a different calendar from schools.

Our descendants may well choose a different calendar.

But Italian movies often follow a different calendar.

However, as he is from Venus, he may be using a different calendar.