# How to calculate number of days between two given dates

To calculate the number of days between two dates, you can use the `timedelta` class from the datetime module.

Here is an example of how to do this:

``````from datetime import datetime, timedelta

# Parse the start and end dates
start_date = datetime.strptime("2022-01-01", "%Y-%m-%d")
end_date = datetime.strptime("2022-01-31", "%Y-%m-%d")

# Calculate the number of days between the two dates
num_days = (end_date - start_date).days

print(num_days)  # prints 30``````

This example calculates the number of days between January 1st and January 31st, 2022.

If you only want to consider business days (i.e., excluding weekends), you can use the `weekday` method of the datetime object to check if a day is a weekday, and then add up the number of weekdays between the two dates.

``````from datetime import datetime, timedelta

# Parse the start and end dates
start_date = datetime.strptime("2022-01-01", "%Y-%m-%d")
end_date = datetime.strptime("2022-01-31", "%Y-%m-%d")

# Initialize a counter
num_weekdays = 0

# Iterate over the days between the two dates
for i in range((end_date - start_date).days + 1):
current_day = start_date + timedelta(days=i)
# Increment the counter if the day is a weekday
if current_day.weekday() < 5:
num_weekdays += 1

print(num_weekdays)  # prints 22``````

This example calculates the number of weekdays between January 1st and January 31st, 2022.