This is a comprehensive list of date and time format specifiers, including both zero-padded and non-zero padded versions where applicable, as well as some additional specifiers for completeness.

Comprehensive strftime and strptime format specifiers

Date specifiers

• %a: Abbreviated weekday name (e.g., Sun, Mon).
• %A: Full weekday name (e.g., Sunday, Monday).
• %w: Weekday as a decimal number (0–6, where Sunday is 0).
• %d: Day of the month as a zero-padded decimal number (01–31).
• %-d: Day of the month as a decimal number (1–31).
• %b: Abbreviated month name (e.g., Jan, Feb).
• %B: Full month name (e.g., January, February).
• %m: Month as a zero-padded decimal number (01–12).
• %-m: Month as a decimal number (1–12).
• %y: Year without century as a zero-padded decimal number (00–99).
• %-y: Year without century as a decimal number (0–99).
• %Y: Year with century as a decimal number (e.g., 2024).
• %j: Day of the year as a zero-padded decimal number (001–366).
• %-j: Day of the year as a decimal number (1–366).
• %U: Week number of the year (Sunday as the first day of the week) as a zero-padded decimal number (00–53).
• %-U: Week number of the year (Sunday as the first day of the week) as a decimal number (0–53).
• %W: Week number of the year (Monday as the first day of the week) as a zero-padded decimal number (00–53).
• %-W: Week number of the year (Monday as the first day of the week) as a decimal number (0–53).
• %V: ISO 8601 week number of the year (Monday as the first day of the week) as a zero-padded decimal number (01–53).
• %-V: ISO 8601 week number of the year (Monday as the first day of the week) as a decimal number (1–53).

Time specifiers

• %H: Hour (24-hour clock) as a zero-padded decimal number (00–23).
• %-H: Hour (24-hour clock) as a decimal number (0–23).
• %I: Hour (12-hour clock) as a zero-padded decimal number (01–12).
• %-I: Hour (12-hour clock) as a decimal number (1–12).
• %p: AM or PM designation.
• %M: Minute as a zero-padded decimal number (00–59).
• %-M: Minute as a decimal number (0–59).
• %S: Second as a zero-padded decimal number (00–60).
• %-S: Second as a decimal number (0–60).
• %f: Microsecond as a decimal number, zero-padded on the left (000000–999999).
• %z: UTC offset in the form ±HHMM[SS] (e.g., +0000, -0430, +0930).
• %Z: Time zone name or abbreviation.

Combined date and time specifiers

• %c: Locale’s appropriate date and time representation (e.g., Mon Sep 30 07:06:05 2024).
• %x: Locale’s appropriate date representation (e.g., 09/30/24).
• %X: Locale’s appropriate time representation (e.g., 07:06:05).

Miscellaneous

• %G: ISO 8601 year with century as a decimal number (e.g., 2024).
• %g: ISO 8601 year without century as a decimal number (00–99).
• %u: ISO 8601 weekday as a decimal number (1–7, where Monday is 1).
• %%: A literal '%' character.

Examples

Here are some examples combining different specifiers for both strftime (formatting) and strptime (parsing) using Jinja2 syntax:

Formatting with strftime

Full date and time in locale’s appropriate representation:

{{ __lead_created_at | strftime('%c') }}  {# Output: Mon Sep 30 07:06:05 2024 #}

Full date in YYYY-MM-DD format:

{{ __lead_created_at | strftime('%Y-%m-%d') }}  {# Output: 2024-09-30 #}

Full time in 24-hour format:

{{ __lead_created_at | strftime('%H:%M:%S') }}  {# Output: 07:06:05 #}

Day of the year:

{{ __lead_created_at | strftime('%j') }}  {# Output: 273 (for September 30th) #}

12-hour clock with AM/PM:

{{ __lead_created_at | strftime('%I:%M %p') }}  {# Output: 07:06 AM #}

Non-zero padded day, month, and hour:

{{ __lead_created_at | strftime('%-d-%-m-%-H') }}  {# Output: 1-9-7 (for September 1st, 07:00 AM) #}

Week number of the year (Sunday as the first day):

{{ __lead_created_at | strftime('%U') }}  {# Output: 39 (for the 39th week of the year) #}

ISO 8601 week number and weekday:

{{ __lead_created_at | strftime('%V %u') }}  {# Output: 39 1 (for the 39th week, Monday) #}

Parsing with strptime

Parsing a full date and time in locale’s appropriate representation:

{{ 'Mon Sep 30 07:06:05 2024' | strptime('%c') }}

Parsing a date in YYYY-MM-DD format:

{{ '2024-09-30' | strptime('%Y-%m-%d') }}

Parsing a time in 24-hour format:

{{ '07:06:05' | strptime('%H:%M:%S') }}

Parsing a day of the year:

{{ '273' | strptime('%j') }}

Parsing a 12-hour clock with AM/PM:

{{ '07:06 AM' | strptime('%I:%M %p') }}

Parsing non-zero padded day, month, and hour:

{{ '1-9-7' | strptime('%-d-%-m-%-H') }}

Parsing week number of the year (Sunday as the first day):

{{ '39' | strptime('%U') }}

Parsing ISO 8601 week number and weekday:

{{ '39 1' | strptime('%V %u') }}