Not sure where to start? Examples!
| %a | The abbreviated weekday name ("Sun") |
|---|---|
| %A | The full weekday name ("Sunday") |
| %b | The abbreviated month name ("Jan") |
| %B | The full month name ("January") |
| %d | Day of the month (01..31) |
| %e | Day of the month without a leading zero (1..31) |
| %j | Day of the year (001..366) |
| %m | Month of the year (01..12) |
| %U | Week number of the current year, starting with the first Sunday as the first day of the first week (00..53) |
| %W | Week number of the current year, starting with the first Monday as the first day of the first week (00..53) |
| %w | Day of the week (Sunday is 0, 0..6) |
| %x | Preferred representation for the date alone, no time |
| %y | Year without a century (00..99) |
| %Y | Year with century |
| %H | Hour of the day, 24-hour clock (00..23) |
|---|---|
| %I | Hour of the day, 12-hour clock (01..12) |
| %l | Hour of the day, 12-hour clock without a leading zero (1..12) |
| %M | Minute of the hour (00..59) |
| %P | Meridian indicator ("am" or "pm") |
| %p | Meridian indicator ("AM" or "PM") |
| %S | Second of the minute (00..60) |
| %X | Preferred representation for the time alone, no date |
| %Z | Time zone name |
| %c | The preferred local date and time representation |
|---|---|
| %% | Literal "%" character |