Months to Jubilees (mo to jubilee)

1 month equals 0.001666666667 jubilees (rounded).

1 month = 0.001666666667 jubilees

How to convert months to jubilees

To convert months to jubilees, multiply the number of months by 0.001666666667. The factor is rounded to 10 significant digits. To go the other way, multiply jubilees by 600.

jubilees = months × 0.001666666667

Example: 10 months = 0.01666666667 jubilees.

Months and years are not constant. This site uses the average Gregorian year of 365.2425 days, so one 'year' converts to 365.2425 days, not 365; use 'common year' for exactly 365 days.

About these units

Month (mo)

CalendarCurrent unit

One twelfth of an average Gregorian year: 30.436875 days. Calendar months actually range from 28 to 31 days.

Month and Moon are cognates, and the unit began as the Moon's cycle of phases, about 29.53 days from one new moon to the next. The trouble is that 12 of these fall short of a solar year, so calendars have had to choose. The Islamic calendar stays purely lunar, so its year is about 11 days shorter than the solar year, while the Hebrew calendar is lunisolar, using a 19-year cycle with an extra month. Even the start of a lunar month is still debated between observing the crescent and calculating it.

Gregorian months are a compromise that drifted far from the Moon. Their lengths run from 28 to 31 days, and this site uses their mean of 30.436875 days, one twelfth of the average year. The names also keep Roman history: September to December preserve the Latin numerals for seven to ten, since they were originally the seventh to tenth months, and Quintilis and Sextilis were renamed for Julius Caesar and Augustus. When a contract says month, check whether it means a calendar month or thirty days.

1 month = 2,629,746 seconds (exactly).

Sources: Wikipedia: Month; Wikipedia: Lunar calendar

Jubilee (jubilee)

Biblical (Hebrew)Historical unit (no longer in standard use)

Fifty years (some readings say 49), the biblical cycle after which land was returned.

Leviticus 25 tells the Israelites to count seven sabbaths of years, then to hallow the fiftieth year, when land returned to its original holders and bondservants went free. The Hebrew word yovel also meant a ram and a ram's horn trumpet, and the year was announced by a shofar blast on Yom Kippur. The English word comes from the Latin form iobeleus used in the Vulgate.

Whether the jubilee lasted 49 or 50 years is disputed. Judah the Prince identified it with the 49th year, while most classical rabbis and Maimonides read it as a separate 50th year, and some modern scholars favour 49. The figure used here is 50 years, about 1.58 billion seconds, as one common reading and a convention rather than a settled length. Practice lapsed after the exile. The Catholic Church later borrowed the name: Boniface VIII declared a jubilee in 1300, the interval was set at 50 years in 1343 and 25 years in 1470, and the 2025 jubilee ran from December 2024 to January 2026.

1 jubilee = 1,577,847,600 seconds (exactly).

Sources: Wikipedia: Jubilee (biblical); Wikipedia: Jubilee in the Catholic Church

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