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Explains the history and science behind the restoration of the Creation Calendar.
Explains the colors, symbols and other information displayed on the calendar.
A Hebrew Day begins at sunset.
Find local sunset times for any place.
A Hebrew Month begins with the first visible crescent moon at Jerusalem.
A Hebrew Year begins with Month 1 nearest to the spring equinox.
Describes the Parashah and why it is included in the Creation Calendar.
Calendar related articles previously published on TorahCalendar.com
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Determining the Hebrew Month
A Hebrew Month begins at the moment of sunset the evening the moon's crescent first becomes potentially visible to the naked eye in Jerusalem, assuming ideal sighting conditions without smog, haze or clouds. Sightings with the naked eye only occur if the moon appears in the upper left area outlined by the thin white lines in the sunset diagram below.
View New Moons for any Hebrew Month:
Day Before
New Moon Day
Day After
Hebrew
Month
Gregorian
Year
Month
Year
C.E.
B.C.E.
Next Month's New Moon in Jerusalem at the Moment of Sunset
Sun
Azimuth: 269°
Temple Mount, Jerusalem
Lat 31° 46' 43.8" N
Lon 35° 14' 5.1" E
Elevation + 721 Meters
Avg Temp 19.4°C
Avg Pressure 1010 millibars
MOON
VISIBLE
Altitude
(Degrees)
DAZ = Delta Azimuth: Moon-Sun (Degrees)
Wednesday, 17 Mar 2010 C.E.
15:48:17.84 UT
5:48 PM IST Local Time

Sunset ending Yom Revii
& beginning Yom Hamishi
Starting Day 1 of Month 1
Understanding the Sunset Diagram
The diagram above shows the western sky at sunset as viewed from the Temple Mount in Jerusalem, at or near the beginning of a Hebrew Month. Select one of three buttons for viewing the new moon in Jerusalem on the Day Before, New Moon Day or Day After the new moon. Then press the View button. One can select any Hebrew Month in any Julian or Gregorian year in the range from 2014 B.C.E. to 2014 C.E.

The darker area at the bottom of the diagram represents a view of the land as seen from the observer's location looking toward the western horizon. The yellow circle shows the setting sun's position just below the horizon at sunset. The moon is shown as a thin crescent if it is visible. Otherwise, if the moon's center lies on or below the curved part of the white visibility line, it is represented as a white circle. A white circle indicates that the moon's crescent is too faint to be seen with the naked eye due to the overwhelming effect of the evening twilight when the moon is too low in topocentric altitude.

The numbers across the bottom represent the difference in topocentric azimuth (DAZ) between the moon and the sun in degrees. Topocentric azimuth is the angle measured clockwise from true north where due west is 270 degrees. This diagram is not fixed to a particular azimuth. The point on the western horizon where the sun sets is northward in the summer months and more southward during the winter. However, in this diagram, the sunset is framed so that the sun's position is always shown at the same place in the diagram. The actual topocentric azimuth for both the moon and the sun are shown in the tables below. The numbers along the left side of the diagram above show the topocentric altitude angle of the moon (or sun) measured in degrees from the horizon.

If the moon is visible from Jerusalem, it will always lie within the two straight white lines shown in the diagram. The moon never ventures outside of these boundaries because the inclination of the plane of the moon's orbit never exceeds 5.145 degrees with the plane of the Earth's mean orbit around the sun which is known as the ecliptic.
Astronomical Data for this Sunset Diagram:

Sun's Position:
Sunset Date =
Sunset Time =
Local Sunset Time =
TD-UT = DELTAT =
Julian Day Number =
Local Apparent Sideral Time =
Best Crescent Sighting Time =

Nutation dRa =
Nutation dDec =
Ecliptic Longitude =
Ecliptic Latitude =
Ecliptic Radius =
Light Time =
Aberration dRA =
Aberration dDec =




Apparent Right Ascension =
Apparent Declination =
Apparent Longitude =
Diurnal Aberration dRA =
Diurnal Aberration dDec =
Diurnal Parallax dRA =
Diurnal Parallax dDec =
Atmospheric Refraction =
Atmospheric Refraction dRA =
Atmospheric Refraction dDec =
Topocentric Altitude =
Topocentric Azimuth =
Topocentric Right Ascension =
Topocentric Declination =

Delta Azimuth Moon-Sun (DAZ) =
17 Mar 2010 C.E.
15:48:17.84 UT
5:48 PM IST
+1.1103 Minutes
2455273.1585398
5.82823306 hours
6:32 PM IST

1.006 seconds
6.33 arc-secs
356.94530278°
0.00009167°
0.9951065 au
8.276 minutes
1.261 seconds
8.18 arc-secs




23.813055 hours
-1.21496944°
356.944°
0 seconds
-0.01 arc-secs
-0.501 seconds
-4.63 arc-secs
0.595°
121.434 seconds
1128.07 arc-secs
-0.241°
269.087°
23.84664722 hours
-0.90290278°

2.247°
Moon's Position:
Moonset Date =
Moonset Time =
Local Moonset Time =
Astronomical Conjunction Date =
Astronomical Conjunction Time =
Age of Moon Since Conjunction =
Sunset to Moonset Lag Time =

Nutation dRA =
Nutation dDec =
Geometric Longitude =
Geometric Latitude =
Moon-Earth Radius =
Apparent Geocentric Longitude =
Apparent Geocentric Latitude =
Moon-Earth Distance =
Horizontal Parallax =
Semidiameter =
Elongation from Sun =
Illuminated Fraction =
Apparent Right Ascension =
Apparent Declination =

Diurnal Aberration dRA =
Diurnal Aberration dDec =
Diurnal Parallax dRA =
Diurnal Parallax dDec =
Atmospheric Refraction =
Atmospheric Refraction dRA =
Atmospheric Refraction dDec =
Topocentric Altitude =
Topocentric Azimuth =
Topocentric Right Ascension =
Topocentric Declination =

Arc-of-Light (ARCL) =
Arc-of-Vision (ARCV) =
17 Mar 2010 C.E.
17:25:38.41 UT
7:25 PM IST
15 Mar 2010 C.E.
21:01:00 UT
1d, 18h, 47m, 17.84s
97.34 Minutes

0.976 seconds
7.16 arc-secs
17.097°
5.031°
0.0026523 au
17.101°
5.031°
62.21 Earth-radii
0.92104722°
0.25095278°
20.74°
3.26%
0.92005056 hours
11.35990278°

0.005 seconds
0.05 arc-secs
-184.791 seconds
-1557.44 arc-secs
0.046°
9.633 seconds
82.07 arc-secs
18.974°
271.334°
0.87139694 hours
10.95009167°

20.74979533°
20.633109°
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