After the calendar reform that produced a 12-month year, Quintilis became the seventh month, but retained its name.

He was also very influential in calendar reform.

Dee applied Copernican theory to the problem of calendar reform.

Ali was an educator and an active advocate of calendar reform for about ten years.

As he explains, a proper measurement of the length of the year was a necessary foundation to calendar reform.

Another might be attracted to it because he sees in it the possibility of calendar reform.

A calendar reform is any significant revision of a calendar system.

He worked there at a time when Jesuit missionaries were in charge of calendar reforms.

Literally every issue between the two factions was brought up, including the question of calendar reform.

The 1969 calendar reform removed the feast of Ss.