days_before_month

calendrical_calculations::gregorian

Function days_before_month 

Source 
pub const fn days_before_month(year: i32, month: u8) -> u16
Expand description

The number of days in this year before this month starts

Inspired by Neri-Schneider https://onlinelibrary.wiley.com/doi/10.1002/spe.3172