Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said, "The religion (of Islam) is easy, and whoever makes the religion a rigour, it will overpower him. So, follow a middle course (in worship); if you can't do this, do something near to it and give glad tidings and seek help (of Allah) at morn and at dusk and some part of night".
[Al-Bukhari Book 01,Chapter 02, Hadith # 038]
Lesson : as mentioned above in Surah Al-Hajj Ayat 67."For every nation We have ordained religious ceremonies and rituals" Besides moderation in worship, this Hadith enjoins that such times should be fixed for worship when one is fresh so that one feels pleasure in performing it. But this principle is for optional and voluntary prayers only. Obligatory Salat are to be performed at the prescribed times only.