Time Conversion in Go (Golang)

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Overview

Time can be represented in GO in below 5 formats:

  • time.Time object
  • Unix Time (Also known as Epoch Time) – It is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970. This time is also known as the Unix epoch
  • Unix Nano –  It is the number of nanoseconds elapsed since 00:00:00 UTC on 1 January 1970
  • Unix MilliSecond – It is the number of milliseconds elapsed since 00:00:00 UTC on 1 January 1970
  • Unix MicroSecond – It is the number of microseconds elapsed since 00:00:00 UTC on 1 January 1970

Conversions

time.Time To Others

Let:

timeT := time.Now()

Time Unix

tUnix := timeT.Unix()

Time Unix Millisecond

tUnixMilli := int64(time.Nanosecond) * timeT.UnixNano() / int64(time.Millisecond)

Time Unix Microsecond

tUnixMicro := int64(time.Nanosecond) * timeT.UnixNano() / int64(time.Microsecond)

Time Unix Nanosecond

tUnixNano := timeT.UnixNano()

Full Working Code

package main

import (
    "fmt"
    "time"
)

func main() {
    timeT := time.Now() //It will return time.Time object with current timestamp
    fmt.Printf("time.Time %s\n", timeT)

    //Converstion to Time Unix also known as epoch time
    tUnix := timeT.Unix()
    fmt.Printf("timeUnix: %d\n", tUnix)

    //Conversion to Time Unix Millisecond
    tUnixMilli := int64(time.Nanosecond) * timeT.UnixNano() / int64(time.Millisecond)
    fmt.Printf("timeUnixMilli: %d\n", tUnixMilli)

    //Conversion to Time Unix Microsecond
    tUnixMicro := int64(time.Nanosecond) * timeT.UnixNano() / int64(time.Microsecond)
    fmt.Printf("timeUnixMicro: %d\n", tUnixMicro)

    //Conversion to Time Unix Nanosecond
    tUnixNano := timeT.UnixNano()
    fmt.Printf("timeUnixNano: %d\n", tUnixNano)
}

Output:

time.Time 2020-01-27 23:03:21.528106 +0530 IST m=+0.000191621
timeUnix: 1580146401
timeUnixMilli: 1580146401528
timeUnixMicro: 1580146401528106
timeUnixNano: 1580146401528106000

time Unix To Others

Let

tUnix := time.Now().Unix()

time.Time

tUnix := timeT.Unix()

Time Unix Millisecond

 tUnixMili := tUnix * int64(time.Microsecond)

Time Unix Microsecond

tUnixMicro := tUnix * int64(time.Millisecond)

Time Unix Nanosecond

tUnixNano := tUnix * int64(time.Second)

Full Working Code

package main

import (
    "fmt"
    "time"
)

func main() {
    tUnix := time.Now().Unix()
    fmt.Printf("timeUnix %d\n", tUnix)

    //Conversion to time.Time
    timeT := time.Unix(tUnix, 0)
    fmt.Printf("time.Time: %s\n", timeT)

    //Conversion to Time Unix Millisecond
    tUnixMili := tUnix * int64(time.Microsecond)
    fmt.Printf("timeUnixMilli: %d\n", tUnixMili)

    //Conversion to Time Unix Microsecond
    tUnixMicro := tUnix * int64(time.Millisecond)
    fmt.Printf("timeUnixMicro: %d\n", tUnixMicro)

    //Conversion to Time Unix Nanosecond
    tUnixNano := tUnix * int64(time.Second)
    fmt.Printf("timeUnixNano: %d\n", tUnixNano)
}

Output:

timeUnix 1580146705
time.Time: 2020-01-27 23:08:25 +0530 IST
timeUnixMilli: 1580146705000
timeUnixMicro: 1580146705000000
timeUnixNano: 1580146705000000000

time Unix MilliSecond To Others

Let

tUnixMilli := int64(time.Nanosecond) * time.Now().UnixNano() / int64(time.Millisecond)

time.Time

tUnix := tUnixMilli / int64(time.Microsecond)
tUnixNanoRemainder := (tUnixMilli % int64(time.Microsecond)) * int64(time.Millisecond)
timeT := time.Unix(tUnix, tUnixNanoRemainder)

Time Unix 

tUnix = tUnixMilli / int64(time.Microsecond)

Time Unix Microsecond

tUnixMicro := tUnixMilli * int64(time.Microsecond)

Time Unix Nanosecond

tUnixNano := tUnixMilli * int64(time.Millisecond)

Full Working Code:

package main

import (
    "fmt"
    "time"
)

func main() {
    tUnixMilli := int64(time.Nanosecond) * time.Now().UnixNano() / int64(time.Millisecond)
    fmt.Printf("timeMilli %d\n", tUnixMilli)

    //Conversion to time.Time
    tUnix := tUnixMilli / int64(time.Microsecond)
    tUnixNanoRemainder := (tUnixMilli % int64(time.Microsecond)) * int64(time.Millisecond)
    timeT := time.Unix(tUnix, tUnixNanoRemainder)
    fmt.Printf("time.Time: %s\n", timeT)

    //Conversion to Time Unix
    tUnix = tUnixMilli / int64(time.Microsecond)
    fmt.Printf("timeUnix: %d\n", tUnix)

    //Conversion to Time Unix Microsecond
    tUnixMicro := tUnixMilli * int64(time.Microsecond)
    fmt.Printf("timeUnixMicro: %d\n", tUnixMicro)

    //Conversion to Time Unix Nanosecond
    tUnixNano := tUnixMilli * int64(time.Millisecond)
    fmt.Printf("timeUnixNano: %d\n", tUnixNano)
}

Output:

timeMilli 1580146846747
time.Time: 2020-01-27 23:10:46.747 +0530 IST
timeUnix: 1580146846
timeUnixMicro: 1580146846747000
timeUnixNano: 1580146846747000000

time Unix MicroSecond To Others

Let

tUnixMicro := int64(time.Nanosecond) * time.Now().UnixNano() / int64(time.Microsecond)

time.Time

tUnix := tUnixMicro / int64(time.Millisecond)
tUnixNanoRemainder := (tUnixMicro % int64(time.Millisecond)) * int64(time.Microsecond)
timeT := time.Unix(tUnix, tUnixNanoRemainder)

Time Unix 

tUnix = tUnixMicro / int64(time.Millisecond)

Time Unix Millisecond

tUnixMilli := tUnixMicro / int64(time.Microsecond)

Time Unix Nanosecond

tUnixNano := tUnixMicro * int64(time.Microsecond)

Full Working Code:

package main

import (
    "fmt"
    "time"
)

func main() {
    tUnixMicro := int64(time.Nanosecond) * time.Now().UnixNano() / int64(time.Microsecond)
    fmt.Printf("tUnixMicro %d\n", tUnixMicro)

    //Conversion to time.Time
    tUnix := tUnixMicro / int64(time.Millisecond)
    tUnixNanoRemainder := (tUnixMicro % int64(time.Millisecond)) * int64(time.Microsecond)
    timeT := time.Unix(tUnix, tUnixNanoRemainder)
    fmt.Printf("time.Time: %s\n", timeT)

    //Converstion to Time Unix
    tUnix = tUnixMicro / int64(time.Millisecond)
    fmt.Printf("timeUnix: %d\n", tUnix)

    //Converstion to Time Unix Milli
    tUnixMilli := tUnixMicro / int64(time.Microsecond)
    fmt.Printf("timeUnixMill: %d\n", tUnixMilli)

    //Converstion to Time Unix Nano
    tUnixNano := tUnixMicro * int64(time.Microsecond)
    fmt.Printf("timeUnixNano: %d\n", tUnixNano)
}

Output:

tUnixMicro 1580147023233931
time.Time: 2020-01-27 23:13:43.233931 +0530 IST
timeUnix: 1580147023
timeUnixMill: 1580147023233
timeUnixNano: 1580147023233931000

time Unix NanoSecond To Others

Let

tUnixNano := time.Now().UnixNano()

time.Time

tUnix := tUnixNano / int64(time.Second)
tUnixNanoRemainder := (tUnixNano % int64(time.Second))
timeT := time.Unix(tUnix, tUnixNanoRemainder)

Time Unix 

tUnix = tUnixNano / int64(time.Second)

Time Unix Millisecond

tUnixMilli := tUnixNano / int64(time.Millisecond)

Time Unix Microsecond

tUnixMicro := tUnixNano / int64(time.Microsecond)

Full Working Code

package main

import (
    "fmt"
    "time"
)

func main() {
    tUnixNano := time.Now().UnixNano()
    fmt.Printf("tUnixNano %d\n", tUnixNano)

    //Conversion to time.Time
    tUnix := tUnixNano / int64(time.Second)
    tUnixNanoRemainder := (tUnixNano % int64(time.Second))
    timeT := time.Unix(tUnix, tUnixNanoRemainder)
    fmt.Printf("time.Time: %s\n", timeT)

    //Conversion to Time Unix
    tUnix = tUnixNano / int64(time.Second)
    fmt.Printf("timeUnix: %d\n", tUnix)

    //Conversion to Time Unix Milli
    tUnixMilli := tUnixNano / int64(time.Millisecond)
    fmt.Printf("timeUnixMilli: %d\n", tUnixMilli)

    //Conversion to Time Unix Micro
    tUnixMicro := tUnixNano / int64(time.Microsecond)
    fmt.Printf("timeUnixMicro: %d\n", tUnixMicro)
}

Output:

tUnixNano 1580147160564568000
time.Time: 2020-01-27 23:16:00.564568 +0530 IST
timeUnix: 1580147160
timeUnixMill: 1580147160564
timeUnixMicro: 1580147160564568
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