Dear Biswal,
To get your doubt cleared, you can refer to Sec. 79 of the Factories Act, 1948, which is considered the mother of all establishment-specific Indian Labor Laws. What we commonly know as Earned Leave is termed as "Annual Leave with Wages" under the mentioned Act. Additionally, concerning shops and establishments in our country, governed by separate State Acts, the Cabinet-approved Model Shops and Establishments (Regulation of Employment and Conditions of Service) Bill of 2016, which is expected to be universally adopted by all States, states in Sec. 11(3) that Leave With Wages should be provided at a rate of one day for every 20 days of work completed by employees who have worked for not less than 240 days in the preceding year.
As per the statutory explanations provided therein, days of work encompass lay-off, maternity leave, days of leave with wages taken in the current year, and days of absence due to temporary disablement resulting from an employment accident. However, even though these days are considered as days worked for the calculation of 240 days of service, employees will not accrue any leave on these days.
Regarding weekly and other statutory holidays, as well as other types of leave taken, my perspective is that such days should be factored into the calculation of Earned Leave for the respective year.