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Earth's axis of inclination and its sense of rotation and revolution around the Sun case the day night time durations.

The regions near the Equator  have nearly 12 hours of day and 1 2 hours of night.  The regions towards the North or towards the South experience  a big difference in the durations of night and day.

At Kashmir, which is quite in the North of Equator, in summer the nights are shorter by an hour and half or so..   In the winter the nights are longer by 1 hour and half or so..

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