يَوْمٌ صَفْوَانُ

, (S, M, K,) and صَافٍ, (M, K,) A day in which the sun is clear, and which is very cold: (S:) or a cold day, (K,) or a very cold day, (M,) without clouds and without thickness [of the air]. (M, K.)

صَفْوَانُ is also a name of The second of the days of cold: (K, TA:) so called because the sky therein is clear of clouds: [as a proper name,] it is determinate, and imperfectly decl. (TA. [See also صُفَيَّةُ.])

صَفْوَانٌ [as a coll. gen. n., of which the n. un. is with ة; and said to be used as a singular and as a plural]: see صَفًا, in three places.