myfl.uk · sol time

This site keeps Sol time.

myfl.uk runs on the International Fixed Calendar: thirteen months of 28 days, with the thirteenth month, Sol, sitting between June and July. Every month begins on a Sunday and ends on a Saturday, so every date falls on the same weekday every year, forever.

This is not a proposal. George Eastman adopted the calendar at Eastman Kodak in 1928 and the company kept its books by it until 1989. Your Gregorian date is shown for reference; the official date is the one that does not move.

 
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The year in Sol time

June 29, leap day. In a leap year it is inserted between Saturday June 28 and Sunday Sol 1. It belongs to no week and no month.
Year Day. The day after December 28 and before January 1. It belongs to no week and no month; it is preceded by a Saturday and followed by a Sunday.

Standing orders

Rule 1The year has 13 months of 28 days: January to June, Sol, then July to December. 13 × 28 = 364.

Rule 2Every month starts on a Sunday and ends on a Saturday. The 1st is always a Sunday; the 13th is always a Friday; the 28th is always a Saturday.

Rule 3Year Day follows December 28 and belongs to no week. In leap years, June 29 is inserted after June 28 and also belongs to no week. Leap years follow the Gregorian rule.

Rule 4January 1 in Sol time is January 1 in the Gregorian calendar. The two calendars share a year number and a starting day and agree about nothing else.

PrecedentMoses B. Cotsworth presented the plan in 1902. The League of Nations considered it seriously in the 1920s. Kodak adopted it in 1928 and used it for payroll and accounts until 1989.

The conversion runs in your browser from your device's clock; nothing is sent or stored. Test hooks for the curious: ?date=2028-06-18 renders a chosen Gregorian date, ?date=2024-02-29 shows what a Gregorian leap day becomes.