Choose a Measurement
Select a measurement and convert between different units
Single conversion
To convert from Year (year) to Month (month), use the following formula:
Let's convert 5 Year (year) to Month (month).
Using the formula:
Therefore, 5 Year (year) is equal to Month (month).
Here are some quick reference conversions from Year (year) to Month (month):
| Years | Months |
|---|---|
| 0.000001 year | month |
| 0.001 year | month |
| 0.1 year | month |
| 1 year | month |
| 2 year | month |
| 3 year | month |
| 4 year | month |
| 5 year | month |
| 6 year | month |
| 7 year | month |
| 8 year | month |
| 9 year | month |
| 10 year | month |
| 20 year | month |
| 30 year | month |
| 40 year | month |
| 50 year | month |
| 100 year | month |
| 1000 year | month |
| 10000 year | month |
A year is the time it takes for the Earth to complete one full orbit around the Sun.
We commonly think of a year as 365 days, but it's not quite that simple. The Earth's journey actually takes a little longer, which is why our calendar needs a special trick to stay accurate.
The Earth takes approximately 365.24 days to travel around the Sun. That extra quarter of a day might not seem like much, but it adds up over time.
To keep our calendar in sync with the Earth's orbit and the seasons, we add an extra day—February 29th—nearly every four years. This is called a leap year.
Without leap years, our calendar would drift by about 24 days every 100 years, and eventually, we'd have summer in December!
Yes! While our calendar uses a 365-day system, scientists use more precise measurements depending on what they're tracking.
The two most common types of years are:
The idea of a "year" can get much, much bigger. Just as the Earth orbits the Sun, our entire solar system orbits the center of the Milky Way galaxy.
This enormous journey is called a Galactic Year (or cosmic year), and it takes an estimated 230 million Earth years to complete. To put that in perspective, the last time our solar system was in this exact spot, dinosaurs were beginning to roam the Earth during the Triassic period.
A month is a unit of time we use in our calendars, lasting from 28 to 31 days.
While it's a simple concept we use every day, the story of the month is a fascinating blend of astronomy and ancient history, tied directly to the Moon's cycle.
The concept of a month is fundamentally tied to the Moon. A "lunar month" (or synodic month) is the time it takes for the Moon to cycle through all its phases, from one new Moon to the next, which is approximately 29.5 days.
Early civilizations built their calendars around this observable cycle. However, because 12 lunar months (~354 days) don't perfectly align with a full solar year (~365.25 days), calendar months were adjusted to their current, slightly longer, and more varied lengths to keep the seasons in sync with the year.
Many of our modern month names are inherited from the ancient Roman calendar, which initially had only ten months and started in March. This is why the names for September, October, November, and December come from the Latin words for seven, eight, nine, and ten, respectively.
Later, January (named for Janus, the god of beginnings) and February were added. Months like March were named for the god Mars, while July and August were renamed to honor the influential Roman leaders Julius Caesar and Augustus Caesar.
The irregular pattern of 28, 30, and 31 days in a month is the result of historical calendar reforms. When the Romans moved from a lunar-based to a solar-based calendar, they needed to spread the days of the year across 12 months.
The system we use today, the Gregorian calendar, is a refinement of the Julian calendar established by Julius Caesar. The specific lengths were a practical solution to make 365 days (and later, 365.25 with a leap day) fit into 12 divisions.
February was left with the fewest days, partly because it was the last month added to the original Roman calendar.