Field notes · UTC · approximate astronomy
March
2021 lunar calendar
A month-at-a-glance record of the Moon’s changing light and approximate tropical-zodiac position. Use it to observe a cycle—not to outsource a decision.
- 4
- principal phases
- 13
- sign changes
- UTC
- one declared clock
01 · Almanac
March 2021 at noon UTC
The daily phase, illumination, lunar day, and sign are noon snapshots. Marked times below are approximate UTC boundary estimates.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Libra
Waning Gibbous · 93%
Scorpio
Waning Gibbous · 79%
Sagittarius
Last Quarter · 59%
Capricorn
Last Quarter · 38%
Aquarius
Waning Crescent · 19%
Pisces
New Moon · 2%
Aries
New Moon · 1%
Taurus
Waxing Crescent · 8%
Gemini
First Quarter · 33%
Cancer
First Quarter · 54%
Leo
Waxing Gibbous · 83%
Virgo
Waxing Gibbous · 95%
02 · Boundary ledger
When the month turns
Times are written in UTC so the reference stays reproducible. Your local calendar app may display them in your device time zone.
-
01
Lunar phase
Last Quarter
-
02
Lunar phase
New Moon
-
03
Lunar phase
First Quarter
-
04
Lunar phase
Full Moon
-
05
Moon sign
Moon enters Scorpio
-
06
Moon sign
Moon enters Sagittarius
-
07
Moon sign
Moon enters Capricorn
-
08
Moon sign
Moon enters Aquarius
-
09
Moon sign
Moon enters Pisces
-
10
Moon sign
Moon enters Aries
-
11
Moon sign
Moon enters Taurus
-
12
Moon sign
Moon enters Gemini
-
13
Moon sign
Moon enters Cancer
-
14
Moon sign
Moon enters Leo
-
15
Moon sign
Moon enters Virgo
-
16
Moon sign
Moon enters Libra
-
17
Moon sign
Moon enters Scorpio
03 · Read the fine print
An honest compact calendar
Phase dates use a mean 29.530588853-day synodic cycle. Moon positions use a compact low-order geocentric longitude estimate sampled and refined in UTC. Dates and times are approximate; near a boundary, use a current high-precision ephemeris.
No planetary retrograde dates are shown because this dependency-free calendar does not have the high-precision planetary ephemeris required to publish them responsibly.
What the downloaded calendar contains
The .ics file contains only this month’s principal lunar phases and approximate Moon-sign changes. Each event repeats the approximation note. It contains no account, birth data, note, or tracking identifier.