Symmetry454 is a new calendar system meant to improve the Gregorian calendar that we use today.

・The Symmetry454 calendar is perpetual, meaning you never have to buy a calendar every new year.
・Its symmetrical structure paves the way to simpler, aesthetically pleasing calendar designs.
・Its leap year design produces more accurate relative to the astronomical mean northward equinox.
・Every Symmetry454 year, quarter, month and week starts on Monday and ends on Sunday.
・Every day number within each Symmetry454 month is always on the same weekday in every month.
・Monthly meetings on a fixed weekday are always on the same day number in every month, simplifying scheduling, for example the 3rd Thursday is always the 18th day of every month.
・Its symmetrical 13-week quarters are always identical, having the same number of weekdays and weekend days.
・Every date has permanently fixed week-in-year and day-in-year ordinal numbers, facilitating administrative, academic, commercial and industrial applications, and simplifying calendar arithmetic.
・There is always a whole number of weeks in every year, in every quarter, and in every month.
・Every secular holiday, event, anniversary, birthday, and memorial day has a permanently fixed weekday and date, because the calendar is perpetual.
・Holiday and/or special day overlaps are less likely to occur and are easy to predict and avoid.
・The first 4 weeks of every Symmetry454 month are identical.
・The coherent structure of the calendar enables simple arithmetic expressions in calculating the following for statistical or business purposes: weekday; day number of year, quarter or month; week number of year, quarter or month; month number of year or quarter.
・Symmetry454 calendar and its arithmetic is in the public domain, allowing royalty-free computer implementation and its free use without copyright restrictions.
・"Friday the 13th" never happens.

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This application shows you the current date (in Symmetry454 calendar) and time (in .beat time in your own time zone). It also allows you to convert Gregorian calendar dates to Symmetry454 dates.

This software is, while functional, still in its infancy, and I plan to add more features as time goes, such as setting alarms, count-down timers, split time counters, adding events and holidays and memos to the calendar, among others. In the meantime, please enjoy the available features.

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OrthoCube Software is a loyal supporter of privacy and security.

This application does not access your files nor read your contacts. (It shouldn't ask for such permission.) This application was made to be useful, is not made for profit, and does not contain any kind of advertisement. Most importantly, it does not perform any suspicious activity that might affect the security and privacy of the user.