The months September, October and December are the 9th, 10th and 12th months of the year respectively. But sept, oct and dec are the roman words for 7, 8 and 10 respectively. Why do these names correspond to these positions? They're hangovers from the Julian calendar, in which they were the 7th to 10th months.
Because Roman emperors kept messing with the calendar. The Roman calendar used to begin with March and have 10 months, in which case October, November, and December really were months 8, 9, and 10.
It's one of the things "the Romans did for us" - slotting in two months - July named after Julius Caesar and August named after Augustus Caesar. This nudged the later months along by two and so September became the ninth instead of the seventh month etc.
The months bore the names Martius, Aprilis, Maius, Juniius, Quintilis, Sextilis, September, October, November, and December—the last six names correspond to the Latin words for the numbers 5 through 10.
Julius Caesar's astronomers explained the need for 12 months in a year and the addition of a leap year to synchronize with the seasons. At the time, there were only ten months in the calendar, while there are just over 12 lunar cycles in a year.
The most surreal part of implementing the new calendar came in October 1582, when 10 days were dropped from the calendar to bring the vernal equinox from March 11 back to March 21. The church had chosen October to avoid skipping any major Christian festivals.
March 24, 1750 was followed by March 25, 1751 (March 25 was the first day of the "Old Style" year) December 31, 1751 was followed by January 1, 1752 (the switch from March 25 to January 1 as the first day of the year)
January is the first month of the year in the Julian and Gregorian calendars. Its length is 31 days. The first day of the month is known as New Year's Day.
The “Gregorian Calendar” skipped 10 days in October of 1582 in order to make up for the extra days which had been accrued under the Julian calendar, and established a more accurate accounting for leap years to avoid the accrual of extra days in the future.
The old Roman calendar started in March, so October was the eighth month. When the Roman senate changed the calendar in 153 BCE, the new year started in January, and October became the tenth month.
The Month of Cheshvan. The month of Cheshvan is the eighth month on the Biblical calendar, counting from Nisan. It also coincides with October-November on the Gregorian calendar. The Bible refers to this month as “Bul” (1 Kings 6:38 ), meaning “rainy.” However, following Israel's Babylonian exile, its name was changed.
People in Britain going to bed on September 2 1752 woke up the next day on September 14. It happened because the country switched from an old dating system, the Julian calendar, to a new one, the Gregorian calendar. This brought Britain in line with most of Europe.
In the ancient Roman calendar, October was the name of the eighth month of the year. Its name comes from octo, the Latin word for “eight.” When the Romans converted to a 12-month calendar, they tried to rename this month after various Roman emperors, but October's name stuck!
The eighth month in the old calendar of Romulus c. 750 BC, October retained its name (from Latin and Greek ôctō meaning "eight") after January and February were inserted into the calendar that had originally been created by the Romans.
Calendars based on lunar cycles can create confusion. A lunar year has about 354 days, while a solar year has about 365 days. To address this issue, designers created the Gregorian calendar as a solar calendar. It includes 12 months, ensuring it stays aligned with the seasons with exactly 365.2422 days.
The Gregorian Calendar was then introduced on October 4th 1582 and, to realign it to the Julian Calendar, it was necessary to eliminate ten days by passing directly to October 15.
Under the Gregorian calendar system, a year must be divisible by four to be a leap year. Years divisible by 100 are excluded unless they are also divisible by 400. Since 2026 does not meet this requirement, February will have 28 days, and the year will follow a standard 12-month format.
The Julian calendar is the one that was introduced in the year 46 BC by Julius Caesar to all of the Roman Empire, and it is the calendar that was used during the life of Jesus Christ and at the time of the early Church.
The day on 01/01/0001 is Monday.
According to International Organisation for Standardization (ISO), the first day of the week (which is equivalent to the day on the first day of the first month of the first,) is Monday.
There is no year 0. Jesus was born before 4 B.C.E. The concept of a year "zero" is a modern myth (but a very popular one). In our calendar, C.E. 1 follows immediately after 1 B.C.E. with no intervening year zero.
Most years have 52 weeks, but if the year starts on a Thursday or is a leap year that starts on a Wednesday, that particular year will have 53 numbered weeks.
While the 12-month system dominates today, many ancient cultures followed a lunar-based calendar, often incorporating 13 months instead of 12. These calendars were deeply connected to nature, agriculture, and religious traditions. The Mayan Tun-Uc calendar was one of the most well-documented 13-month systems.
Kiribati, specifically its Line Islands (like Kiritimati), is the first country to celebrate the New Year, followed closely by Samoa, Tonga, and New Zealand's Chatham Islands, all thanks to their location just west of the International Date Line. These Pacific island nations usher in January 1st hours before most other countries, making them the first to welcome the new year.
Where did the name March come from? The name March is ultimately derived from the Latin word Martius (named after Mars, the Roman god of war). Martius was the name of the first month in the original Roman calendar.
January 1: In New Zealand, the 32,754 population of Gisbourne are the first to see in a new millennium. January 1: In London, new millennium celebrations take place and the Millennium Dome is officially opened by Queen Elizabeth II.