Which one of the following statements is NOT correct ?

1. The National song Vande Mataram was composed by Bankim Chandra Chatterjee originallyin Bengali
2. The National Calender of India based on Saka era has its 1st Chaitra on 22nd March normally 21st March in leap year
3. The design of the National Flag of India adopted by the constituent Assembly on 22nd July, 1947
4. The song 'jana-gana-mana,composed origenally in Bengali bas Rabindranath Tagore was adopted in its Hindi version by the constitute Assembly on 24th January, 1950 as the National Anthem of India