In these videos we are teaching numbers 0 to 31 because they align to the calander month.

To sign your birthdate, you could sign '14 - Dec' which would mean your birthdate is the 14th December.

To add a year to your birthdate you could sign 20 (twenty) then 0 (zero) 4 (four) or 2-0-0-4 (2004) or 20 (twenty) then 16 (sixteen) to mean 2-0-1-6 (2016)

All numbers higher than 32 follow the same pattern as all the 20's - ie 56, 78, 43.