Yes, they should do it. The United Nations should discuss, assess, and accept any viable proposal for calendar upgrade. They almost approved the proposed World Calendar in 1955, but a veto from the government of the United States postponed the issue. The Second Ecumenical Council of the Vatican declared that the Vatican did not oppose efforts designed to introduce a calendar applicable to any year into civil society in 1963.

The latest adoption of the Gregorian calendar was in Saudi Arabia in October 2016. The approach to calendar reform is still being explored and discussed. There are still several active proposals for calendar reform. Although any calendar reform will cause chaos and the enormous transition cost will be unaffordable, the Weeky Calendar won't have such issues. It is 100% compatible and in parallel with the Gregorian calendar. Wikipedia about Calendar Reform stated, "If a proposed design is sufficiently close to the legacy one, i.e. compatible with it, a reform of the local calendar system is possible without disruption." The Weeky Calendar will be the only viable calendar upgrade that can seamlessly transform the current calendar into a perennial one and is still 100% compatible with the current calendar.

Birthday Leave is a common practice in many companies and countries, in which employees are entitled to a paid day of birthday leave on a working day. That will make sure all people may equally have a day off on their birthdays. The policy can even extend to the spouse. That ensures all days are good birthdays. It is also common for people to celebrate their birthday together on the weekend. By the way, the superstition of "Friday on the 13th day" will never exist in the Weeky Calendar. All days in the Weeky Calendar are good birthdays.

The Weeky Calendar follows the International Standard of ISO-8601, in which Monday is the first day of the week. The Gregorian calendar defined Monday as the first day of its 400-year cycle, in which the first day of 2001 was on Monday. Some countries, such as the United States, South America, and China, present the week on Sunday first. They practically treat every week starting from Monday for work and take rest on Sunday. The Weeky Calendar can show the weeks with either Sunday or Monday first. However, if the world compromises Sunday as the first day of the week, Weeky Calendar will follow Sunday as the first day, in which the first month of every quarter will have Friday on the 13th day.

Countries can name the days of the week according to their cultures or religions, in which people can work on the first five days and rest or worship at the weekend. Thus, Islamic countries and Muslims can name the days of the week accordingly for praying on the sixth and seventh days and aligning with the working days of other countries and international financial markets.

The Weeky Calendar is compatible with the current calendar using the same month structure. While we can use both calendar systems in parallel, we can use the Weeky Calendar at whatever time. For seamless transition without breaking the sequence in the days of the week, any years that start on Monday can be considered, such as the common years 2029, 2035, 2046, etc., and the leap years 2024, 2052, etc. People will find almost no significant difference while transiting to the Weeky Calendar. Then, no further calendar renewal will happen again. People and businesses will significantly benefit from the simple and practical Weeky Calendar.

Weeky Date is the value-added feature of the Weeky Calendar that labels a day with the weekday name (Monday to Sunday), the week number (1 to 52) shown in superscript, and the year. "Weeky Day" is the Weeky Date without the year. We can easily add the new "Weeky Date" function in any software program. That explains how simple to adopt and transit to the Weeky Calendar. This webpage also contains the source code of the "Weeky Date" function in Javascript, which anyone can copy via "DevTools" of an internet browser. Here is an example of "WeekyDay" as an Excel VBA function usable in an Excel formula, such as the formula of "=WeekyDay(TODAY())" will give "":

Public Function WeekyDay(inDate As Date) As String
    Dim supNumber As Variant: Dim daysAhead As Variant: Dim weeksAhead As Variant
    'Using the Superscripted numbers in the Unicode
    supNumber = Array(8304, 185, 178, 179, 8308, 8309, 8310, 8311, 8312, 8313)
    daysAhead = Array(0, 0, 3, 4, 0, 2, 5, 0, 3, 5, 0, 3, 5)
    weeksAhead = Array(0, 1, 5, 9, 14, 18, 22, 27, 31, 35, 40, 44, 48)
    Dim mth As Integer: mth = VBA.Month(inDate)
    Dim day As Integer: day = VBA.day(inDate)
    Dim dwi As Integer: dwi = (daysAhead(mth) + day) Mod 7
    If dwi = 0 Or (mth = 12 And day = 31) Then dwi = 7
    With WorksheetFunction
        Dim dow As String
        dow = .Text(DateSerial(year:=2001, Month:=1, day:=dwi), "ddd")
        If ((mth = 9 And day = 1) Or (mth = 12 And day = 31)) Then
            dow = dow + .Unichar(8314)
        Else
            Dim wks As Integer
            wks = (daysAhead(mth) + day - dwi) / 7 + weeksAhead(mth)
            If wks < 10 Then
                dow = dow + .Unichar(supNumber(wks))
            Else
                dow = dow + .Unichar(supNumber(Int(wks / 10)))
                dow = dow + .Unichar(supNumber(wks Mod 10))
            End If
        End If
    End With
    WeekyDay = dow
End Function

In 2018, when I taught my eight-year-old son how to read the calendar in Auckland, New Zealand, he intuitively asked me several simple questions. Why is February the shortest month? Why is August a long month? He also asked why we renew the calendar annually and whether the months relate to some astronomical observances. Ironically, no textbooks answered those questions. I started researching calendar systems and found that the design of the Gregorian calendar was just arbitrary for some religious purposes and not astronomically. The annual calendar renewal is the worse calendarial feature with many debates, which is annoying, inefficient, and redundant. It confuses our memory, wastes our continuous effort, and spends resources dealing with the annual calendar variations.

However, we seem to have no solution and just dogmatically follow the instituted Gregorian calendar. There were trials of using different calendar systems and many proposals for calendar reform. All research and studies suggested the abortion of the annual calendar renewal and adoption of a perennial calendar system. However, none were accepted because those proposals introduced different days for weeks and months that could seriously affect all documents and computer systems. For instance, there are seven days a week with four weeks a month and 13 months a year, six days a week with six weeks a month and ten months a year, etc. Some proposals suggested a leap year with a leap week instead of a leap day for leap shifting so that a general year has 364 days and a leap year has 371 days. It is inconsistent and inconvenient by the significant shift of seven days in the leap year. It seems the resulting simple calendar is just another way of complexity. As a result, while the transition is unaffordable, the adoption is impossible.

The Gregorian calendar changes annually because it must align around 365.25 days in a solar year into seven-day weeks. Thus, a year can have 52 or 53 weeks. The ISO Week-numbering year has 364 and 371 days instead of the usual 365 or 366 days. If each date in the year has its fixed day of the week, no annual renewal will happen again. The Weeky Calendar is compatible with the Gregorian calendar by retaining all dates and ensuring the year with just 52 weeks. Initially, we used a prototype named as NexCalendar to collect feedback and opinions. Having taken five years of rigorous studies verified by thousands of people of different ages, religions, and backgrounds, we published the Weeky Calendar in January 2023. It is the most viable calendar upgrade. All people, businesses, organizations, and countries can afford such a seamless and affordable calendar upgrade. The advantages and benefits are permanent and forever.

The Weeky Calendar is compatible with the Gregorian calendar. Only the weeks are standardized and subtly extended by an Extra Saturday and an Extra Sunday to ensure every quarter with consistent 13 weeks. The Weeky Calendar is much complete and structured in perfect harmony. The subtle changes will not affect the thousand-year history, cultures, traditions, and religious beliefs linked with the calendar. Religions may relevantly arrange the Extra Saturday and Sunday as extra worship days. That is very considerate for all strata of society.

Nowadays, we know that 29.53058 are the mean days of the lunar months in the lunar cycle, and 365.24219 are the mean days of the solar years. Their orbits are independent and hard to align into weeks. It takes around 19 years for them to meet in the same position. Both year and month are never dividable by seven. The creation of the Universe (God) did not astronomically apply the whole number of seven as we expected. Since the seven-day week is imperfect with astronomical facts, the Weeky Calendar makes it a perfect fit with the subtle enhancements of Extra Saturday and Extra Sunday. It also benefits religions to have equal or more days for people to attend church.

Early Romans used eight-day weeks in civil practice for centuries before Emperor Constantine established the seven-day week in 321 CE. The mix of some 8-day weeks and 7-day weeks existed in the age of Jesus Christ. The Bible did not argue there were some eight-day weeks, the eighth-day Sabbaths, etc. The Weeky Calendar rigorously ensures the same 52 weeks for any Gregorian calendar year, which benefits all people, businesses, religions, and future generations. The Extra Saturday and the Extra Sunday can be extended worship days that present "higher respect" to any religion than keeping the confusing annual calendar renewal and its clunky calendar variations.