sajda at sahar times
The time of sahar is the final one-sixth of the night. That is, it is the final one-sixth of the duration from sunset to the time of imsak (the time when prohibition on eating begins). Let us say for example that the sun sets at 5:30 p.m. and the time of imsak occurs at 5:30 a.m., the night is 12 hours long. The one-sixth of this equals 2 hours. When it is subtracted from 5:30 a.m., it is 3:30 a.m. The time of sahar is from 3:30 a.m. to 5:30 a.m. This duration increases or decreases in summer and winter.