Follow this link for a detail list of State wise date of Makar Sankranti in India.
Lord Surya is worshipped on the Makar Sankranti day. Another major event is the bathing ritual in the River Ganga. Uttarayana Punyakalam, the day time of Devas, begins with the Makar Sankranti and lasts for six months. This period is ideal for all kind of auspicious activities.
Makar Sankranti is observed throughout
Another popular event associated with Makar Sankranti is the kite flying in