Tahajjud Time:
The actual time for Tahajjud Salah is after one wakes up from his/her sleep and the most virtuous time is towards the latter portion of the night. [1] However if one is not able to awaken for the performance of Tahajjud Salah, then he/she should perform Nafl Salah before sleeping.
Ishraq Time:
The time for Salat al-Ishraq extends from after sunrise (approximately 15 min. after sunrise) and ends before midday when the sun reaches its zenith. However, it is best to perform Salat al-Ishraq early when its time sets in.
Dhuha (Chast) Time:
Similarly, the time for Salat al-Dhuha extends from after sunrise (approximately 15 min. after sunrise) and ends before midday when the sun reaches its zenith. [2] However, based on a narration of Rasulullah Sallallahu Alaihi Wa Sallam, the best time to perform Salat al-Dhuha is after one-fourth of the day expires. In other words, the day stretches from sunrise to sunset. After dividing this period into four parts, the best time for Dhuha would be after the first part terminates.
Awwabin Time:
The time for Salat al-Awwabin is after the performance of Maghrib Salah.