The NDA exam date of first attempt is April 18, 2021 and NDA second attempt is September 5, 2021.
The NDA 2021 syllabus is as follows:-
For 1st paper(Mathematics):-
- Differential Calculus
- Statistics and Probability
- Vector Algebra
- Analytical Geometry Of Two And Three Dimensions
- Matrices And Determinants
- Integral Calculus And Differential Equations
For 2nd paper(General Ability Test):-
- English language
- General Science
Refer here for more info - NDA Syllabus 2021 - Check Section Wise (Maths & GAT) Syllabus & Exam Pattern (careers360.com)
Feel free to ask doubts in the Comment Section.
I hope this information helps you.