The Time for the Adhkaar of Morning and Evening
Question

                Should the adhkaar (words of remembrance) of evening be recited after the ‘Asr (laate afternoon) prayer or after sunset? (i.e., after Maghrib prayer?).
Praise be to Allah.
    The adhkar of evening start 
    after the sun passes the zenith (at the beginning of the time for Zuhr/afternoon 
    prayer) until the sun sets, and at the beginning of the night. The adhkar of 
    the morning start from the break of dawn until the sun passes the zenith. 
    Allah says (interpretation of the meaning): 

    “... and glorify the praises of 
    your Lord before the rising of the sun, and before its setting.”

    [Ta-Ha 20:130] 

    “And remember your Lord within 
    yourself, humbly and with fear and without loudness in words in the mornings 
    and in the afternoons.”

    [al-A’raf 7:205] 

    “afternoon” means between ‘Asr 
    and Maghrib. 

    And Allah says (interpretation 
    of the meaning): 

    “So glorify Allah [above all 
    that (evil) they associate with Him (O believers)], when you come up to the 
    evening [i.e. offer the (Maghrib) sunset and (‘Isha) night prayers], and 
    when you enter the morning [i.e. offer the (Fajr) morning prayer].

    And His are all the praises and 
    thanks in the heavens and the earth; and (glorify Him) in the afternoon 
    (i.e. offer ‘Asr prayer) and when you come up to the time, when the day 
    begins to decline (i.e. offer Zuhr prayer).”

    [al-Room 30:17, 18] 

    And Allah is the Source of 
    strength, may Allah send peace and blessings upon our Prophet Muhammad and 
    his family and  Companions. End quote. 

    Standing Committee for Academic 
    Research and Issuing Fatwas 

    Fatawa al-Lajnah al-Daimah 
    li’l-Buhooth al-‘Ilmiyyah wa’l-Ifta 
    (24/178) 

    See also question no. 
    
    22765.
And 
    Allah knows best.