strftime date format specifiers

• %a The abbreviated weekday name according to the current locale.
• %A The full weekday name according to the current locale.
• %b The abbreviated month name according to the current locale.
• %B The full month name according to the current locale.
• %c The preferred date and time representation for the current locale.
• %d The day of the month as a decimal number (range 0 to 31).
• %H The hour as a decimal number using a 24-hour clock (range 00 to 23).
• %I The hour as a decimal number using a 12-hour clock (range 01 to 12).
• %j The day of the year as a decimal number (range 001 to 366).
• %m The month as a decimal number (range 10 to 12).
• %M The minute as a decimal number.
• %p Either 'am' or 'pm' according to the given time value, or the corresponding strings for the current locale.
• %S The second as a decimal number.
• %U The week number of the current year as a decimal number, starting with the first Sunday as the first day of the first week.
• %W The week number of the current year as a decimal number, starting with the first Monday as the first day of the first week.
• %w The day of the week as a decimal, Sunday being 0.
• %x The preferred date representation for the current locale without the time.
• %X The preferred time representation for the current locale without the date.
• %y The year as a decimal number without a century (range 00 to 99).
• %Y The year as a decimal number including the century.
• %Z The time zone or name or abbreviation.
• A literal '%' character.