1. Solar time and Sidereal (Star) Time

2. Lines of Longitude Separated by 15 degrees (time zones)
24 x 15 degrees = 360 degrees

3. Latitude
Latitude of equator = 0
Latitude of poles = + 90 and -90

4. Latitude and Longitude
Prime meridian Greenwich England
Two number define a point

5. Time Zones A time zone is 15 degrees wide
There are 24 in all, 24 x 15 = 360 degrees

6. Real Time Zones
Time Zones are irregular for political and practical reasons (4 in USA)

7. International Date Line
Time zone at 180 degrees from Greenwich

8. Crude History of Calender
Leap Year and Major Corrections
Modern Gegorian Calendar

9. Solar vs. Sidereal Time Solar Time has 24 hours (arbitrary)
Sidereal Time is 4 minutes less (23h56m)

10. Lunar Calendar Solar Months
Synodic or Solar Month (~ 29.5 days)
Sidereal Month (27.3 days)

11. Phases of the Moon
Angle between Earth, Moon and Sun