'period of Rahu') or rāhukālam (Sanskrit: राहुकालम्, romanized: Rāhukālaṃ) is an inauspicious period of the day,[1] not considered favourable to start any good deed.
The rāhukāla spans for approximately 90 minutes every day between sunrise and sunset.
However, routine tasks that have already been started are regarded to be permissible to continue as usual during this period.
[3] During the legend known as the Samudra Manthana, an asura named Svarbhanu, disguised as a deva, appears and drinks the nectar of immortality, amrita.
Svarbhanu later gets caught and is cut into two pieces by Vishnu's discus, the Sudarshana Chakra.