1 month
30.44 daysTime · definition
A month is defined here as one twelfth of a Julian year (30.4375 days). Calendar months vary.
Time
Just how long is 1 month?
A duration of 1 month is 2,629,800 seconds.
Years & lifetimes
1 months
ELAPSED TIME
1 month
A month is defined here as one twelfth of a Julian year (30.4375 days).
30.44 daysTime
0
Moon phase synodic cycle
The Moon phase synodic cycle is the average time between identical lunar phases, such as from one full moon to the next.
29.53 daysMean synodic month
0
Both timelines start together. Length measures elapsed time, not a physical distance.
A little perspective
1 month is about 1.03 times the mean synodic month of the Moon’s synodic cycle.
Measurements, assumptions & sources +
1 month
Time: 30.44 days; definition.
A month is defined here as one twelfth of a Julian year (30.4375 days). Calendar months vary.
Moon phase synodic cycle
Mean synodic month: 29.53 days; approximate.
The mean interval between matching lunar phases is about 2,551,443 seconds, or 29.5306 days. Individual lunations vary.
The marked mean synodic month is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 1 month with the mean synodic month of the Moon’s synodic cycle. The notes below explain how each value was chosen.
Moon phase synodic cycle
29.53 daysMean synodic month · approximate
The mean interval between matching lunar phases is about 2,551,443 seconds, or 29.5306 days. Individual lunations vary.
- Comparing
- Time ↔ Mean synodic month
- Relative size
- 1 month is about 1.03 times the mean synodic month of the Moon’s synodic cycle. 1 month is approximately 3.07% greater than the mean synodic month of the Moon’s synodic cycle.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The mean synodic month of the Moon’s synodic cycle: This is an estimate; check the notes for its rounding and uncertainty.
A duration is an interval, not a calendar date.
2,629,800 sseconds
730.5 hhours
30.438 daysdays
0.083333 yearsyears
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.