Sun dating phenomena
The designation “first contact” refers to the moment when the disk of the Moon, invisible against the bright sky background, first touches the disk of the Sun.The partial phase of the eclipse then begins as a small indentation in the western rim of the Sun becomes noticeable.The dark disk of the Moon now gradually moves across the Sun’s disk, and the bright area of the Sun is reduced to a crescent.On Earth the sunlight, shining through gaps in foliage and other small openings, is then seen to form little crescents of light that are images of the light source, the Sun. Based on moon cycles instead of sun cycles "Leap months" are added to sync up with sun cycles Used to be calculated by observation Calculated mathematically since 4th century Years are numbered from Creation A few years ago, I was in a synagogue, and I overheard one man ask another, "When is Chanukkah this year?" The other man smiled slyly and replied, "Same as always: the 25th of Kislev." This humorous comment makes an important point: the date of Jewish holidays does not change from year to year.
Reflection occurs when light bounces off the surface of an object.
From the uniformitarian perspective, it was obvious that the Earth must have existed for an utterly immense period of time; the measured rates of geologic change, e.g.
erosion and uplift, were far too slow to create the modern shape of Earth's surface without millions and millions of years.
Holidays are celebrated on the same day of the Jewish calendar every year, but the Jewish year is not the same length as a solar year on the civil calendar used by most of the western world, so the date shifts on the civil calendar.
The Jewish calendar is based on three astronomical phenomena: the rotation of the Earth about its axis (a day); the revolution of the moon about the Earth (a month); and the revolution of the Earth about the sun (a year).