Common year starting on Monday

File:January 1900 calendar.jpg

A common year starting on Monday is any non-leap year (i.e., a year with 365 days) that begins on Monday, 1 January, and ends on Monday, 31 December. Its dominical letter hence is G. The most recent year of such kind was 2018, and the next one will be 2029 in the Gregorian calendar, or likewise, 2019 and 2030 in the Julian calendar, see below for more. This common year is one of the three possible common years in which a century year can begin on and occurs in century years that yield a remainder of 300 when divided by 400. The most recent such year was 1900, and the next one will be 2300.

Any common year that starts on Monday has two Friday the 13ths: those two in this common year occur in April and July.Template:Globalize-inline From July of the year in this type of year to September in the year that follows this type of year is the longest period that occurs without a Friday the 13th, unless the following year is a leap year starting on Tuesday, in which case the gap only 11 months, as the next Friday the 13th is already in June.

This type of year has three instances of Tuesday the 13th: in February, March and November. Leap years starting on Thursday have this characteristic in January, April and July.

This year has four months (April, July, September and December) which begin on a weekend-day.

CalendarsEdit

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Applicable yearsEdit

Gregorian calendarEdit

In the (currently used) Gregorian calendar, along with Sunday, Wednesday, Friday or Saturday, the fourteen types of year (seven common, seven leap) repeat in a 400-year cycle (20871 weeks). Forty-three common years per cycle or exactly 10.75% start on a Monday. The 28-year sub-cycle only spans across century years divisible by 400, e.g. 1600, 2000, and 2400.

citation
CitationClass=web }}</ref>	Decade	1st		2nd	3rd		4th	5th	6th		7th	8th		9th		10th
16th century	prior to first adoption (proleptic)														1590
17th century	1601	1607	1618	1629		1635	1646	1657		1663	1674		1685		1691
18th century	1703		1714	1725		1731	1742	1753	1759	—	1770		1781	1787	1798
19th century	—		1810	1821	1827	1838	1849	1855		1866	1877		1883		1894	1900
20th century	1906		1917	1923		1934	1945	1951		1962	1973	1979	—		1990
21st century	2001	2007	2018	2029		2035	2046	2057		2063	2074		2085		2091
22nd century	2103		2114	2125		2131	2142	2153	2159	—	2170		2181	2187	2198
23rd century	—		2210	2221	2227	2238	2249	2255		2266	2277		2283		2294	2300
24th century	2306		2317	2323		2334	2345	2351		2362	2373	2379	—		2390

400-year cycle
0–99	1	7	18	29	35	46	57	63	74	85	91
100–199	103	114	125	131	142	153	159	170	181	187	198
200–299	210	221	227	238	249	255	266	277	283	294
300–399	300	306	317	323	334	345	351	362	373	379	390

Julian calendarEdit

In the Julian calendar, the fourteen types of year (seven common, seven leap) repeat in a 28-year cycle (1461 weeks). This sequence occurs exactly once within a cycle, and every common letter thrice.

As the Julian calendar repeats after 28 years that means it will also repeat after 700 years, i.e. 25 cycles. The year's position in the cycle is given by the formula ((year + 8) mod 28) + 1). Years 6, 12 and 23 of the cycle are common years beginning on Monday. 2017 is year 10 of the cycle. Approximately 10.71% of all years are common years beginning on Monday.

Julian common years starting on Monday
Decade	1st		2nd		3rd		4th		5th		6th		7th		8th		9th		10th
15th century	1403		1414		1425		1431		1442		1453	1459	1470		—		1481	1487	1498
16th century	1509		1515		1526		1537		1543		1554		1565		1571		1582		1593	1599
17th century	1610		—		1621	1627	1638		1649		1655		1666		1677		1683		1694
18th century	1705		1711		1722		1733	1739	1750		—		1761	1767	1778		1789		1795
19th century	1806		1817		1823		1834		1845		1851		1862		1873	1879	1890		—
20th century	1901	1907	1918		1929		1935		1946		1957		1963		1974		1985		1991
21st century	2002		2013	2019	2030		—		2041	2047	2058		2069		2075		2086		2097

HolidaysEdit

InternationalEdit

Valentine's Day falls on a Wednesday
World Day for Grandparents and the Elderly falls on its earliest possible date, July 22
Halloween falls on a Wednesday
Christmas Day falls on a Tuesday

Roman Catholic SolemnitiesEdit

Epiphany falls on a Saturday
Candlemas falls on a Friday
Saint Joseph's Day falls on a Monday
The Annunciation of Jesus falls on a Sunday
The Nativity of John the Baptist falls on a Sunday
The Solemnity of Saints Peter and Paul falls on a Friday
The Transfiguration of Jesus falls on a Monday
The Assumption of Mary falls on a Wednesday
The Exaltation of the Holy Cross falls on a Friday
All Saints' Day falls on a Thursday
All Souls' Day falls on a Friday
The Feast of Christ the King falls on November 25 (or on October 28 in versions of the calendar between 1925 and 1962)
The First Sunday of Advent falls on December 2
The Immaculate Conception falls on a Saturday
Gaudete Sunday falls on December 16
Rorate Sunday falls on December 23

Australia and New ZealandEdit

Australia Day falls on a Friday
Waitangi Day falls on a Tuesday
Daylight saving ends on its earliest possible date, April 1
ANZAC Day falls on a Wednesday
Mother's Day falls on May 13
Father's Day falls on September 2
Daylight saving begins on its latest possible date, September 30 in New Zealand and October 7 in Australia – this is the only common year where the period of standard time over the winter months lasts 26 weeks in New Zealand and 27 weeks in Australia (in all other common years, it lasts only 25 weeks in New Zealand and 26 weeks in Australia)

British IslesEdit

Saint David's Day falls on a Thursday
Mother's Day falls on March 4, March 11, March 18, March 25 or April 1
Saint Patrick's Day falls on a Saturday
Daylight saving begins on its earliest possible date, March 25. This is the only year when First Sunday of Advent of the year preceding this type of year and start of daylight saving time are 16 weeks (112 days) apart, they are 17 weeks (119 days) apart in all other years.
Saint George's Day falls on a Monday
Father's Day falls on June 17
Orangeman's Day falls on a Thursday
Daylight saving ends on October 28
Guy Fawkes Night falls on a Monday
Saint Andrew's Day falls on a Friday

CanadaEdit

Daylight saving begins on March 11
Mother's Day falls on May 13
Victoria Day falls on May 21
Father's Day falls on June 17
Canada Day falls on a Sunday
Labour Day falls on September 3
Thanksgiving Day falls on its earliest possible date, October 8
Daylight saving ends on November 4

United StatesEdit

Martin Luther King Jr. Day falls on its earliest possible date, January 15
President's Day falls on February 19
Daylight saving begins on March 11
Mother's Day falls on May 13
Memorial Day falls on May 28
Father's Day falls on June 17
Juneteenth falls on a Tuesday
Independence Day falls on a Wednesday
Labor Day falls on September 3
Grandparents' Day falls on September 9
Columbus Day falls on its earliest possible date, October 8
Daylight saving ends on November 4
Thanksgiving Day falls on its earliest possible date, November 22

ReferencesEdit

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1 Jan	Count	Ratio	31 Dec	DL	DD	Count	Ratio	31 Dec	DL	DD	Count	Ratio
Year starts			Common years					Leap years
Sun	58	14.50 %	Sun	A	Tue	43	10.75 %	Mon	AG	Wed	15	Template:03.75 %
Mon	56	14.00 %	Mon	G	Wed	43	10.75 %	Tue	GF	Thu	13	Template:03.25 %
Tue	58	14.50 %	Tue	F	Thu	44	11.00 %	Wed	FE	Fri	14	Template:03.50 %
Wed	57	14.25 %	Wed	E	Fri	43	10.75 %	Thu	ED	Sat	14	Template:03.50 %
Thu	57	14.25 %	Thu	D	Sat	44	11.00 %	Fri	DC	Sun	13	Template:03.25 %
Fri	58	14.50 %	Fri	C	Sun	43	10.75 %	Sat	CB	Mon	15	Template:03.75 %
Sat	56	14.00 %	Sat	B	Mon	43	10.75 %	Sun	BA	Tue	13	Template:03.25 %
∑	400	100.0 %				303	75.75 %				97	24.25 %

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