Convert date between Gregorian Calendar and International Fixed Calendar and Reddit 8-Day Week Calendar

The Gregorian Calendar is the most commonly used calendar in the world. A solar calendar, it has 365 days i. a common year, or 366 on leap years.

How do I know if this year is a Leap Year?

Yes: Leap Years are any year that can be exactly divided by 4 (such as 2016, 2020, 2024, etc)

No: except if it can be exactly divided by 100, then it isn't (such as 2100, 2200, etc)

Yes: except if it can be exactly divided by 400, then it is (such as 2000, 2400)

Leap

While the calendar is renowned for its accuracy, there are some issues in the organization of the calendar:

It cannot be divided into equal halves or quarters
The number of days per month is haphazard.
Months and years may begin on any day of the week, making the preceding calendar useless.
Holidays pegged to specific dates may also fall on any day of the week.

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Date Converter

Gregorian

IFC

Reddit 8-Day Week Calendar

Month	Day

Month	Day

Month	Day

Gregorian Date

Day Number

Dates of the Seasons

Northern Hemisphere Equinox and Solstice Dates	Gregorian	IFC	Reddit
Spring	March 20	March 23	March 15
Summer	June 21	Sol 4	June 12
Fall	September 22	September 13	September 9
Winter	December 21	December 19	December 3

Information about the Calendars

Both of these calendars start on Janaury 1 Gregorian.

International Fixed Calendar	Reddit 8-Day Week Calendar
The International Fixed Calendar, one of the numberous proposed calendar reforms, solves many of these issues: The first day of every month starts on Sunday. The calendars are the same each year. Each month is the same length (28 days), other than June and December, which have 29 days. December always has 29 days, while June has 29 days every leap year. The calendar has 13 months, with a new month, Sol, inserted between June and July, representing the Summer Solstice. Unfortunately, the Calendar stopped being used in 1989. Find more information about the life and death of the calendar here.	Posted in the r/lightbulb subreddit, this calendar sports 8 day weeks, with each month having 32 days, except December, which only has 13 in common years, or 14 in leap years. Bonusday is the 8th day of the week, the day after Saturday. This creates a 3 day weekend between Saturday and Sunday while also maintaining the 5-day work week. Because the week is 8 days long, starts on Sunday, and each date of each month is the same day of the week, there are no Friday the 13ths. However, there would be Friday the 13ths if the first day of the week was Monday.

International Fixed Calendar

Reddit 8-Day Week Calendar

The International Fixed Calendar, one of the numberous proposed calendar reforms, solves many of these issues:

The first day of every month starts on Sunday. The calendars are the same each year.
Each month is the same length (28 days), other than June and December, which have 29 days.

December always has 29 days, while June has 29 days every leap year.

The calendar has 13 months, with a new month, Sol, inserted between June and July, representing the Summer Solstice.

Unfortunately, the Calendar stopped being used in 1989. Find more information about the life and death of the calendar here.

Posted in the r/lightbulb subreddit, this calendar sports 8 day weeks, with each month having 32 days, except December, which only has 13 in common years, or 14 in leap years.

Bonusday is the 8th day of the week, the day after Saturday. This creates a 3 day weekend between Saturday and Sunday while also maintaining the 5-day work week.

Because the week is 8 days long, starts on Sunday, and each date of each month is the same day of the week, there are no Friday the 13ths. However, there would be Friday the 13ths if the first day of the week was Monday.