12 dated entries naming Sanskrit, drawn from 11 separate years between 155 BCE and 1786 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.
Also written as Sanskrit language in the source articles; Wikipedia redirects those to the same subject, so their entries are on this page.
155 BCEMenander I (known as Milinda in Sanskrit and Pali) begins his reign as king of the Indo-Greek Kingdom. His territories cover the eastern dominions of the divided Greek empire of Bactria (Panjshir and Kapisa) and extend to the modern Pakistani province of Punjab, most of the Indian states of Punjab and Himachal Pradesh and the Jammu region. His capital is considered to have been Sagala, a prosperous city in northern Punjab believed to be modern Sialkot.source
1st century
78Indian Prince Aji Caka introduces the Sanskrit language and Pallawa script, used to inscribe Javanese words and phrases, to the Indonesian islands.source
3rd century
300The Panchatantra, a Sanskrit collection of fables and fairy tales, is written in India.source
4th century
380Important works on mathematics and astronomy are written in Sanskrit.source
443Gunabhadra, Indian Buddhist monk, is an invited honored guest by emperor Wen of Liu Song (Liu Song dynasty). He translates the Lankavatara Sutra from Sanskrit into the Chinese language.source
671Yijing, Chinese Buddhist monk, travels by boat from Guangzhou, and visits the capital of the partly Buddhist kingdom of Srivijaya in Palembang (Indonesia). He stays for 6 months to study Sanskrit grammar and the Malay language.source
13th century
1223April 14 – On the island of Sri Lanka, King Chodaganga Deva lands at Trincomalee on the Tamil New Year's Day (the 1st of Chittirai of Shaka era year 1145) and makes a large donation to fund the Hindu Koneswaram Temple. The event is commemorated in an inscription in the Sanskrit language in the temple.source
1270The Sanskrit fables known as the Panchatantra, dating from as early as 200 BCE, are translated into Latin, from a Hebrew version by John of Capua.source
17th century
1613Poet Ganesa, son of Gopal Das, wrote Jatakalankara, a brief Sanskrit treatise comprising one hundred twenty-five slokas on predictive Hindu astrologysource
18th century
1786February 2 – In a speech before The Asiatic Society in Calcutta, Sir William Jones notes the formal resemblances between Latin, Greek, and Sanskrit, laying the foundation for comparative linguistics and Indo-European studies.source