Format time like strftime
suggest changeIf you prefer strftime style of formatting time values (as used in Python or Ruby) or porting code that uses that style, you can use one of several libraries.
Here’s an example using github.com/jehiah/go-strftime package:
t := time.Date(2017, 9, 4, 3, 38, 45, 0, time.UTC)
fmt.Println(strftime.Format("%Y-%m-%d %H:%M:%S", t))Side note on package naming: since the package name is strftime, the import path / repository path should be github.com/jehiah/strftime. It’s bad style to add go or go- to repository path.
Unfortunately, when it comes to parsing things are not as good. There are two packages:
but they both are cgo-wrappers around C libraries, which makes them more finicky to build, especially on Windows.
List of strftime directives
| Code | Meaning | Example |
|---|---|---|
| %a | Weekday as locale’s abbreviated name. | Mon |
| %A | Weekday as locale’s full name. | Monday |
| %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") | am |
| %p | Meridian indicator ("AM" or "PM") | 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 |
You can also use http://www.strfti.me/ service to help you build strftime formatting strings.
Found a mistake? Have a question or improvement idea?
Let me know.
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