There are six ritus (also transliterated rutu) or Indian seasons in the Hindu calendar. The following table gives an overview about the partititon of the year in the traditional Indian calendar.
| No. | Ritu (Rutu) | Season | Hindu months | Gregorian months |
| 1 | hemanta | pre-winter | margashiirSha to pouSha | December to February |
| 2 | shishira | Winter | maagha to phaalguna | February to April |
| 3 | vasanta | Spring | chaitra to vaishaakha | April to June |
| 4 | griiShma | Summer | jyeShTha to aashaaDha | June to August |
| 5 | varSha | Rainy | shraavaNa to bhaadrapada | August to October |
| 6 | sharat | Autumn | aashviiyuja to kaartika | October to December |
The seasons are described in the Sanskrit poem Ritu Samhaaram.
See also: Vedic timekeeping, Hindu calendar, Hinduism, Geography of India, Culture of India.