Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| No. | Ritu | Season | Hindu lunar months | Gregorian month | Characteristics | Seasonal festivals |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Vasanta\nवसन्त | Spring | Chaitra and Baisakh | ~ March to May | Temperature around 20-30 degrees; vernal equinox occurs in the middle of this season. | Vasant panchami, Ugadi, Gudhi Padwa, Holi, Rama Navami, Vishu/RongaliBihu/Baisakhi/Tamil Puthandu, Hanuman Jayanti |
| 2 | Grishma\nग्रीष्म | Summer | Jyeshta and Aashaadha | ~ May to July | Very hot, temperatures up to 50 degrees Celsius; ends with the summer solstice. | Vat Pournima, Rath Yatra, Guru Purnima |
| 3 | Varsha\nवर्षा | Monsoon | Shraavana (Sawan) and Bhadrapada (Bhado) | ~ July to September | Very hot, very humid and heavy monsoon rains; begins with the summer solstice. | Raksha Bandhan, Krishna Janmaashtami, Ganesh Chaturthi, Onam, Gurujonar Tithi |
| 4 | Sharad\nशरद्, पतझड़ | Autumn | Ashwin (Kwar) and Kartika | ~ September to November | Mild temperatures; 19 to 22 degrees Celsius; Autumnal equinox occurs in the middle of this season. | Navaratri, Vijayadashami, Sharad Purnima, Bihu |
| 5 | Hemant\nहेमन्त | Fall winter | Margashirsha (Agrahayana, Agahan) and Pausha (Poos) | ~ November to January | Very pleasant temperatures; generally, 20-25 degrees Celsius; ends with the winter solstice. | (mid-Winter celebration), Bihu, Deepavali, Kartik Poornima |
| 6 | Shishir\nशिशिर | Winter | Magh and Phalguna (Phagun) | ~ January to March | Moderately cold, but pleasant during occasional sunshine; temperatures may decrease below 10 degrees Celsius.This season is typical to tropical and subtropical regions, because trees actually shed their leaves in this season in tropical areas; starts with the winter solstice. | Shivaratri, Shigmo, Pongal, Sankranthi |
Question:
how long does grishma last?
Answer:
May to July