I would like to get current time value. I found this answer which works for me but don't know why format method take 20060102150405 value? Not like yyyyMMdd hhmmss.
See https://golang.org/pkg/time/#pkg-constants It is the time "01/02 03:04:05PM '06 -0700" Because each component has a different number (1, 2, 3, etc.), it can determine from the numbers what components you want.
Go's time formatting unique and different than what you would do in other languages. Instead of having a conventional format to print the date, Go uses the reference date 20060102150405 which seems meaningless but actually has a reason, as it's 1 2 3 4 5 6 in the Posix date command:
Mon Jan 2 15:04:05 -0700 MST 2006
0 1 2 3 4 5 6
The timezone is 7 but that sits in the middle, so in the end the format resembles 1 2 3 4 5 7 6.
This online converter is handy, if you are transitioning from the strftime format.
Interesting historical reference: https://github.com/golang/go/issues/444
The time package provides handy constants as well:
const ( ANSIC = "Mon Jan _2 15:04:05 2006" UnixDate = "Mon Jan _2 15:04:05 MST 2006" RubyDate = "Mon Jan 02 15:04:05 -0700 2006" RFC822 = "02 Jan 06 15:04 MST" RFC822Z = "02 Jan 06 15:04 -0700" // RFC822 with numeric zone RFC850 = "Monday, 02-Jan-06 15:04:05 MST" RFC1123 = "Mon, 02 Jan 2006 15:04:05 MST" RFC1123Z = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone RFC3339 = "2006-01-02T15:04:05Z07:00" RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00" Kitchen = "3:04PM" // Handy time stamps. Stamp = "Jan _2 15:04:05" StampMilli = "Jan _2 15:04:05.000" StampMicro = "Jan _2 15:04:05.000000" StampNano = "Jan _2 15:04:05.000000000" )
You can use them like this:
t := time.Now()
fmt.Println(t.Format(time.ANSIC))
20060102150405 is a date and time format 2006/01/02 15:04:05
package main
import ( "fmt" "time" )
func main() {
date1 := time.Now().Format("2006/01/02 15:04")
fmt.Println(date1)//2009/11/10 23:00
date2 := time.Now().Format("20060102150405")
fmt.Println(date2)//20091110230000
}