Satyavratasmriti 1.7: Kālanirṇaya · Bhagavantabhāskara · Jayasīṃhakalpadruma +1

1.7

eka eva yadā māsaḥ saṃkrāntidvayasaṃyutaḥ | māsadvayagataṃ śrāddhaṃ malamāse 'pi śasyate

When a single month is joined with two solar transits (saṅkrānti), / the śrāddha belonging to two months is commended even in an intercalary month.

When a single month contains two solar transits, the śrāddha belonging to the two months is approved even in the intercalary month.