Holdun Consistent Calendar
W H Y

Abbreviations used in text:
TC - Traditional Calendar (Sunday first day of week version)
HCC - Holdun Consistent Calendar

The Reason for the HCC
The reason of the HCC is, in large part:

One, to bring a consistency in the number of days in a given month, avoiding the "Thirty days has November, April, June, and November. All the rest have 31, except for February, which has 28, unless the year is divisible by 4 - but not 100 unless it is also divisible by 400, - in which case it has 29." zaniness.

Two, to eliminate the need to casually toss in an extra day every four years (more or less, kinda sorta as per the ditty above).

Three, to start every week, month, year on the same day - Monday. This keeps all HCC users on the same page (day of week).

Four, to keep weekly calculations (when it starts, when it ends) within the same month, quarter, year. To keep month calculations within the same quarter, year. To keep quarter calculations with the same year.

A Logical Alternative Where Appropriate
The HCC is meant to be a logical alternative to the TC in certain use cases such as in accounting, or work or activity scheduling and reporting. So it's not an either use the HCC or the TC. It's use both the HCC and the TC where the HCC simple structure is appreciated and advantageous.

The Big Picture
Big picture-wise, the TC is inconsistent and difficult to manage. I won't repeat the long history of the evolution of the TC - from disappearing dates in 1582 and a whole new calendar because of three too many leap days in the upto then accepted calendar model, to the long failed history of attempts made over centuries to finagle the extra days into the calendar via an extra full month or mini-month added here or there within the calendar. Just Google/Bing or Wikipedia/Britannica "history of the calendar" for as in-depth an explanation of all the shenanigans that went on to twist and cojule the days of the year into the current calendar - or gave up trying - as you'd care to read.

One argument for the HCC is that the strained manipulations taken to make the current version of the TC function should not be adopted and extended just because we are use to using it and have come to accept it's oddities and live with its confusions and limitations. In all other modes of our lives we give up the current "kinda good enough given enough tweaking" technology, be it computers or washing machines, or energy production, or, ... to learn and incorporate a newer, better technology that expands our capacities and productivity - even with the cost of purchasing that new technology and adapting to it. And we accept that some of us will rebel against the change while others are unable to make the transition for various reasons. These people live out their lives using the by-passed technology they currently have while history then rolls forward without them.

But for those who wish to adopt a more logical framework of timekeeping, the HCC is here for your consideration.

Year to Year Comparisons
Just to illustrate one use-case among many: In business it is common if not legally or contractually necessary to compare year to year, quarter to quarter, or month to month results.

For the year to year comparison, half the time businesses are comparing a non-leap year of 365 days to a leap year of 366 days (assuming year four is a leap year: year 3 with 4, year 4 with 1, vs year 1 with 2, year 2 with 3).

With the HCC, this issue disappears as all years have the same number of days.

Month to Month Comparisons
Month to Month comparisons have a similar numerical issue regarding number of days in a given month as detailed above. In addition, for many businesses there is the issue of just what days are being compared. For example a restaurant might put more focus on Fridays and Saturdays receipts than Monday or Tuesday receipts. A July starting on a Monday followed by an August which then starts on a Thursday (2024 calendar) has 2 fewer Friday or Saturday dates (8 vs 10) even though both months have the same number of days. So a comparison is faulty and at minimum requires an asterisk and footnote.

With the HCC, this issue disappears as all months have the same number of days and the same number of each day (e.g. Fridays).

Week to Week Comparisons
Week to week comparisons are inherently easier in the HCC as well as all weeks exist within the same month, same quarter, same year and don't spill over into the next month, quarter, or year.

53 Weeks in a TC Year?
From an early age we are taught that there are 52 weeks in a year. But if you need to do accounting or report on a weekly basis within a given year, every six years or so you run into a year that has 53 weeks! This is where the surprised emoji would go. This happens whenever a New Year begins on a Wednesday in the TC (Thursday if using the ISO standard of Monday as first day of week. Tuesday if using an Islamic calendar which begins on Saturday).

And the first week of a TC year includes dates from the previous year if the New Year starts on Monday, Tuesday, or Wednesday. Similarly the last week of a TC year contains days in the following year if the last day is on Thursday or Friday.

And the first week of a TC year excludes dates in the current year if the New Year starts on Thursday, Friday, or Saturday. Similarly the last week of a TC year excludes days in the current year if the last day is on Sunday, Monday, or Tuesday. This is where the frustrated emoji would go.

There is none of this contrivance with the HCC. The New Year starts on Monday, all weeks start on Monday, all weeks (48) are entirely contained within the given year (Mic drop!).

90 Days in a TC Quarter! Or is that 91?
A confusion also reigns in the determining the length of Quarters for accounting. Consider traditional quarter to quarter comparisons.

The first quarter (Jan-Mar) has 90 or 91 days again depending on if a leap year is in play. The second quarter (Apr-Jun) has 91, the third quarter (Jul-Sep) and the fourth quarter (Oct-Dec) has 92.

So in three of every four years the 1st-2nd quarter comparison is comparing a 90 day quarter with a 91 day quarter. And comparing year over year 1st quarter comparisons is subject to the same issues as the year to year comparisons because of leap years.

In addition, the 2nd-3rd quarter comparison is off a day (91 vs. 92). The 4th-1st quarter comparison is off a day (92 vs 91 in a leap year) or off two days (92 vs 90 in a non-leap year).

And besides, for business or organizations where the day of the week matters, as entertainment venues or restaurants where weekend day revenues are much different than Monday-Thursday revenues, doing a quarter to quarter comparison, even with the same number of days, could be subject to one quarter having more lucrative days than the the other, making the comparison not all it should be.

With the HCC, this issue disappears as all quarters have the same number of days. And all quarters have the same number of weekend days.

Time Zones
Time Zones don't exist in the HCC structure. (See the What page under the Time Zones heading for a detailed explanation of why this is.) Not incorporating time zones avoids much confusion when coordinating current or scheduled time across multiple jurisdictions around the globe. And even more so when calculating differences in shipping and traveling time between one or more areas that may or may not be in a different TC time zone. Here again I will defer to Google/Bing or Wikipedia/Britannica for the litany of details, complications, and confusions of time zones for anyone so inclined to explore this topic. Spoiler alert! - it's not pretty!