When is International Mother Language Day celebrated annually?

When is International Mother Language Day celebrated annually?
Past Papers: PMS Combined Competitive Examination — Past Paper MCQs
A: 19 February
B: 20 February
C: 21 February
D: 22 February

International Mother Language Day; observed on February 21; promotes linguistic diversity; inspired by Bangladesh’s 1952 language movement. Other dates are incorrect. This day underscores cultural preservation; vital for studying language’s role in identity; education; and global cultural heritage.