I am reading akanAn2URu poem 141 where there are some astronomical references to "Kaartttikai viLakkITu" festival. This festival is one of the most important in Tamil 'Saiva calender, and is two-weeks after Deepavali. In general, 'suura samhaaram fetsival in Murukan temples also happens in between the two.
A beautiful sangam poem with astronomical allusions to three most important festivals in Tamil 'Saiva calender year cycle: (a) Deepavali, where the divine couple start the dice game (b) 'Siva parakrama episodes follow culminating in Lingodbhava utsavam in Tiruvannamalai and (c) 'Suura samhaaram by the divine couple's child, Murukan.