These works are done especially in Dakshinayana.
Uttarayan refers to the movement of the Sun in the north direction. Dakshinayana includes winter, autumn, and monsoon. The summer solstice is also called Uttarayan. Winter Solstice is also known as Dakshinayan. Uttarayan includes winter, spring, and summer; Dakshinayana includes winter, autumn, and monsoon. Dakshinayana is associated with the knowledge of sadhana. In Uttarayan the days are long and the nights are short. Dakshinayana is related to long nights and short days. During Uttarayan, auspicious works like engagement, marriage, the commencement of work, house entry, and house construction are done, during Dakshinayan these works are stopped, fasting, worship, sadhana, and penance are done.

Dakshinayana beliefs
It is also believed that Lord Vishnu falls asleep during this period and the Ekadashi just before Sankranti is known as Devshayani Ekadashi. Two methods are followed to calculate the speed of the Sun. In some methods of Panchang Siddhanta, Dakshinayana begins when the Sun enters Cancer and some regional calendars follow this method. In this system, Dakshinayana starts on June 21, 2022. But most of the Hindus in South India follow the Nirayana system and this Dakshinayana begins when the 'Nirayan Sun' enters Cancer, in this system Dakshinayana starts around 16th July. Uttarayan is the movement of the Sun from South to North and is just opposite Dakshinayana where both have their own importance.

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