سَرَارُ الشَّهْرِ
1.
and
سِرَارُهُ, (S, M, K,) but the latter is not approved by the lexicologists [in general], (Az,) and
سَرَرُهُ (S, M, K) and
سِرَرُهُ, (M,) and
لَيْلَةُ السِّرَارِ (S) [or السَّرَارِ &c.], The last night of the lunar month: (S, K:) or when the month is twenty-nine, it is the twenty-eighth night; and when the month is thirty, it is the twenty-ninth night: (Fr:) or the night in which the moon becomes concealed by the light of the sun: (M:) sometimes this is the case one night, and sometimes it is two nights. (AO, S.) [See also الدَّعْجَاءُ, voce أَدْعَجُ.]
2.
سَرَارٌ is also synonym with سِرٌّ, in two senses: see سِرٌّ, in the latter part of the paragraph, in four places.
3.
It signifies also [Dates in the unripe state in which they are termed] سَيَابٌ [q. v.]. (K.)