nightlong

from WordNet (r) 3.0 (2006)

nightlong
    adj 1: lasting, open, or operating through the whole night; "a
           nightlong vigil"; "an all-night drugstore"; "an overnight
           trip" [syn: {nightlong}, {all-night}, {overnight}]

from The Collaborative International Dictionary of English v.0.48

Nightlong \Night"long`\ (?; 115), a.
   Lasting all night.
   [1913 Webster]