Non-Gregorian January observances

Bihu is of three types and it is an important cultural festival unique to the Indian state of Assam – 'Rongali' or 'Bohag Bihu' observed in April, 'Kongali' or 'Kati Bihu' observed in October or November, and 'Bhogali' or 'Magh Bihu' observed in January. The festivals present an admixture of Tibeto-Birman, Austroasiatic and Indo-Aryan traditions entwined so intricately that it is impossible to separate them—festivals which are uniquely Assamese to which all communities of Assam had contributed elements. The Rongali Bihu is the most important of the three, celebrating spring festival. The Bhogali Bihu or the Magh Bihu is a harvest festival, with community feasts. The Kongali Bihu or the Kati Bihu is the sombre, thrifty one reflecting a season of short supplies and is an animistic festival.

Tết (chữ Hán: 節), short for Tết Nguyên Đán (chữ Hán: 節元旦; lit. 'Festival of the first day'), is the most important celebration in Vietnamese culture. Tết celebrates the arrival of spring based on the Vietnamese calendar and usually falls on January or February in the Gregorian calendar.

Thaipusam or Thaipoosam (Tamil: Taippūcam) is a Tamil Hindu festival celebrated on the first full moon day of the Tamil month of Thai coinciding with Pusam star. The festival signifies that Lord Murugan is a Siddha and an enlightened being. On this auspicious day, he transcended from his physical form, a concept known as Mukthi in Hinduism. He dedicated his life to serving humanity and left behind a wealth of wisdom for society.

Makar(a) Sankrānti (Sanskrit: मकरसङ्क्रान्ति, Makarasaṅkrānti), (transl. Capricorn Festival) also referred to as Uttarāyana, Makara, or simply Sankrānti, is a Hindu observance and a mid-winter harvest festival in India and Nepal. It is typically celebrated on 14 January annually (15 January on a leap year), this occasion marks the transition of the sun from the zodiac of Sagittarius (dhanu) to Capricorn (makara). As this transition coincides with the sun's movement from south to north, the festival is dedicated to the solar deity, Surya, and is observed to mark a new beginning. Across India, the occasion is celebrated with numerous multi-day festivals.

Pongal (IPA:) is a multi-day Hindu harvest festival celebrated by Tamils. The festival is celebrated over three or four days with Bhogi, Thai Pongal, Mattu Pongal and Kaanum Pongal, beginning on the last day of the Tamil calendar month of Margazhi, and observed on consecutive days. Thai Pongal is observed on the first day of the Tamil calendar month of Thai and usually falls on 14 or 15 January in the Gregorian calendar. It is dedicated to the solar deity Surya and corresponds to Makar Sankranti, the Hindu observance celebrated under various regional names across the Indian subcontinent.

Vasanta (Sanskrit: वसन्त, Vasanta, 'Spring'), also referred to as Basant, refers to the Indian spring.

Þorrablót (transliterated as thorrablot) is an Icelandic midwinter festival, named for the month of Þorri of the historical Icelandic calendar (corresponding to mid January to mid February), and blót, literally meaning sacrifice.

Korean New Year (Korean: 설날; RR: Seollal; MR: Sŏllal) is the first day of the Korean lunar calendar. It is one of the most important traditional Korean holidays. The celebration usually lasts three days: the day before Korean New Year, Korean New Year itself, and the day after Korean New Year. During this time, many Koreans visit family, perform ancestral rites, wear hanbok(한복), eat traditional food, and play folk games. Additionally, children often receive money from their elders after performing a formal bow.

Maghe Sankranti (Nepali: माघे सङ्क्रान्ति, Maithili: माघि, Nepal Bhasa: घ्यःचाकु संल्हु) is a Nepali festival observed on the first of Magh in the Vikram Sambat (B.S) or Yele calendar marking the end of the winter solstice and the month of Poush. The Tharu people celebrate this day as their new year. It is also regarded as a major government-declared annual festival of the Magar community. Maghe Sankranti shares similarities with solstice festivals in various other religious traditions.

Vasant Panchami, also rendered Vasanta Panchami and Saraswati Puja in honour of the Hindu goddess Saraswati, is a festival that marks the preparation for the arrival of spring. The festival is celebrated in Indian religions in different ways depending on the region. Vasant Panchami also marks the start of preparation for Holika and Holi, which take place forty days later. The Vasant Utsava (festival) on Panchami is celebrated forty days before spring, because any season's transition period is 40 days, and after that, the season comes into full bloom.