What is the ruling on dedicating the period between Maghrib and Isha prayers, or the period between Friday prayer and Asr prayer, to the remembrance of Allah and sending blessings upon the Prophet?

Designating a specific time for remembrance (dhikr) can be categorized into two forms:

First: To do so as an act of worship and with the belief in its merit. This is not legislated except for what has been authentically established by the Lawgiver.

Second: Not to do so as an act of worship, but rather during one's free time and when feeling energetic. There is no harm in this. Scholars have considered the act of worship by dedicating a time not mentioned in Islamic law as an "additive innovation" (bid'ah idafiyyah).

Among the times when it is legislated to dedicate to remembrance are: between Fajr and sunrise, and between Asr and sunset; based on the Almighty's saying: (And glorify your Lord with praise before the rising of the sun and before its setting), and His saying: (And remember your Lord within yourself in humility and fear without being apparent in speech—in the mornings and the evenings). Also, according to a narration by Muslim, the Prophet (peace be upon him) used to sit in his prayer place after praying Fajr until the sun rose.

Among the recommended times for remembrance and supplication is the last hour of Friday.

There is no evidence for the superiority of dedicating time between Jumu'ah prayer and Asr for remembrance. However, there is no harm in dedicating it if it is done during free time or when energetic, not as an act of worship.

As for the time between Maghrib and Isha, it is a time for evening remembrances according to some scholars, while others are of the opinion that supererogatory prayers are generally recommended during this time.