Python strftime directive %w
Weekday as a decimal number, 0=Sunday … 6=Saturday.
Example (from datetime(2026, 6, 18, 13, 45, 30))
4
In Python
from datetime import datetime
dt = datetime(2026, 6, 18, 13, 45, 30)
dt.strftime("%w")
# => "4"Parsing with strptime
Parses a weekday number 0–6 (Sunday is 0). See strptime.dev for the parsing side.