Gulika Kalam is a period of time in Hindu astrology that is believed to be inauspicious for doing any good work. It is also known as Gulika Kaal or Gulikai Kal. Gulika is the son of Lord Shani or Saturn, and is considered a shadowy planet like Rahu and Ketu, which is more powerful in producing negative effects. Gulika Kalam rises twice a day, once during the day and again at night, and repeats itself twice a day. The timing of Gulika Kalam is calculated based on the sunrise and sunset timings, and it lasts for 90 minutes or 1.5 hours per day. The popular belief is that whatever happens during Gulika Kalam will repeat itself, and hence one should not perform any inauspicious work during this time. Ancient seers also supported this belief by saying that one should avoid conducting any inauspicious rites during Gulika Kalam. However, conducting any auspicious ceremonies during Gulika Kalam is a personal choice. Gulika Kalam is not allocated a weekday in Vedic astrology, and hence it falls on the first muhurat on Saturday, the second muhurat on Friday, the third muhurat on Thursday, the fourth muhurat on Wednesday, the fifth muhurat on Tuesday, the sixth muhurat on Monday, and the seventh muhurat on Sunday.