Date and time notation in India
has been adopted as BIS IS 7900:2001.
Date
In India, the DD-MM-YYYY and DD/MM/YYYY are the two predominant short form representations of the date in the Gregorian calendar. The hyphen and oblique are both used as separator between the date fields. Almost all government documents need to be filled up in the DD-MM-YYYY or DD/MM/YYYY format. An example of DD-MM-YYYY usage is the passport application form, while the passport itself contains the date in DD/MM/YYYY format, as does the PAN card.But two expanded forms are used in India. The DD MMMM YYYY usage is more prevalent over the MMMM DD, YYYY usage except the latter is more used by media publications, such as the print version of the Times of India and The Hindu.
Many government websites, including Prime Minister's official website, retain the historical format used by Britain during the colonial era until sometime in the 20th century.
The month-day-year in short format, is never used in India except regionally in Bodo.
Mondays are the start of the week as per ISO 8601. Traditionally, Sunday is considered as the first day of the week in India and the official calendar published by the Government of India shows the day order from Sunday to Saturday with Monday depicted as the start of workweek with weekends falling on Saturday and Sunday. Indian Railway time tables follows the day order from 1 to 7 for railway scheduling with Day 1 as Monday and Day 7 as Sunday, e.g. train 12345 runs on Days 1, 2, 3, 4, and 5, in other words Monday through Friday.