Crate adtobs

Functions

• convert_ad_to_bs
  Converts a Gregorian (English) date to a Nepali date (Bikram Sambat).
• convert_utc_to_bs
  Converts a UTC date string to a Nepali date (Bikram Sambat).
• get_todays_np_date
  Gets today’s date in the Nepali calendar (Bikram Sambat).