Time Calculation

Time calculation depends on the Earth's rotation around its axis. One day is 24 hours.

Standard Time

• The Earth rotates 360° in 24 hours. Therefore 15° in 1 hour, 1° in 4 minutes.
• The Earth is divided into 24 time zones. The count is taken from Greenwich (the 0° meridian).
• Going east, time moves ahead, going west, it falls behind.
• Every 15° difference in longitude gives a 1-hour time difference.
• Local (solar) time is the same along one meridian. When the Sun crosses the meridian, it is noon (midday).

International Date Line

• The International Date Line: the 180° meridian.
• From west to east: 1 day is subtracted, when crossing from east to west, 1 day is added.

Time in Uzbekistan

Uzbekistan is in the UTC+5 zone (5 hours ahead of Greenwich).

Formula for local (solar) time: local time = Greenwich time + (east longitude ÷ 15) hours. For example, for Tashkent (69° E) 69 ÷ 15 = 4 hours 36 minutes. Our clocks, however, show standard time, that is, UTC+5.

1. Take the Greenwich time (for example 12:00)
2. Add the UTC offset (+5 hours)
3. Tashkent time is 17:00

The reverse: if it is 20:00 in Tashkent, then in Greenwich it is 20 - 5 = 15:00.