Invariable Calendar

In April 1900, Professor L. A. Grosclaude of Geneva proposed the Invariable Calendar, New Era Calendar, or Normal Calendar with 12 months and four 91-day quarters of exactly 13 weeks. ^[1]

5 relations: Alexander Philip, Armelin's calendar, Perennial calendar, Sabbath in seventh-day churches, World Calendar.

Alexander Philip

Alexander Philip (22 May 185821 January 1932) was a Scottish solicitor and campaigner for calendar reform.

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Armelin's calendar

Armelin's calendar was developed around 1887 by French astronomer Gustave Armelin, who developed a twelve-month calendar in which the year of 364 days was divided into four equal quarters of 91 days.

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Perennial calendar

A perennial calendar is a calendar that applies to any year, keeping the same dates, weekdays and other features.

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Sabbath in seventh-day churches

The seventh-day Sabbath, observed from Friday evening to Saturday evening (exact start and ending times varying from group to group), is an important part of the beliefs and practices of seventh-day churches.

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World Calendar

The World Calendar is a proposed reform of the Gregorian calendar created by Elisabeth Achelis of Brooklyn, New York in 1930.

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References

[1] https://en.wikipedia.org/wiki/Invariable_Calendar

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