time.Time.UnmarshalJSON() Function in Golang with Examples Last Updated : 10 May, 2020 Comments Improve Suggest changes Like Article Like Report In Go language, time packages supply the functionality for determining as well as viewing time. The UnmarshalJSON() function in Go language is used to implement the json.Unmarshaler interface. The time here is a quoted-string which is in RFC 3339 format. Moreover, this function is defined under the time package. Here, you need to import the "time" package in order to use these functions. Syntax: func (t *Time) UnmarshalJSON(data []byte) error Here, "t" is the pointer to the stated time, and "data" is the byte slice that represents JSON's encoding that was generated by MarshalJSON() method. Return value: It decodes the encoding that was returned by MarshalJSON() method and returns an error occurred but if there is no error then "nil" is returned. Example 1: C // Golang program to illustrate the usage of // Time.UnmarshalJSON() function // Including main package package main // Importing fmt and time import "fmt" import "time" // Calling main func main() { // Defining t for MarshalJSON method t := time.Date(2013, 7, 6, 12, 34, 33, 01, time.UTC) // Calling MarshalJSON() method encoding, _ := t.MarshalJSON() // Defining tm for UnmarshalJSON() method var tm time.Time // Calling UnmarshalJSON method with its parameters decode := tm.UnmarshalJSON(encoding) // Prints output fmt.Printf("Error: %v\n", decode) } Output: Error: <nil> Example 2: C // Golang program to illustrate the usage of // Time.UnmarshalJSON() function // Including main package package main // Importing fmt and time import "fmt" import "time" // Calling main func main() { // Defining t for MarshalJSON method t := time.Date(2034, 45, 33, 43, 90, 70, 6447, time.UTC) // Calling MarshalJSON() method encoding, _ := t.MarshalJSON() // Defining tm for UnmarshalJSON() method var tm time.Time // Calling UnmarshalJSON method with its parameters decode := tm.UnmarshalJSON(encoding) // Prints output fmt.Printf("Error: %v\n", decode) } Output: Error: <nil> Here, the "t" stated in the above code has values that are outside usual range but they are normalized while conversion. Comment More infoAdvertise with us Next Article time.Time.UnmarshalJSON() Function in Golang with Examples N nidhi1352singh Follow Improve Article Tags : Go Language GoLang-time Similar Reads time.Time.UnmarshalText() Function in Golang with Examples In Go language, time packages supplies functionality for determining as well as viewing time. The UnmarshalText() function in Go language is used to implement the encoding.TextUnmarshaler interface. The time here is a quoted-string which is in RFC 3339 format. Moreover, this function is defined unde 2 min read time.Time.UnmarshalBinary() Function in Golang with Examples In Go language, time packages supply functionality for determining as well as viewing time. The UnmarshalBinary() function in Go language is used to implement the encoding.BinaryUnmarshaler interface. Moreover, this function is defined under the time package. Here, you need to import the "time" pack 2 min read time.Time.UnixNano() Function in Golang with Examples In Go language, time packages supply functionality for determining as well as viewing time. The Time.UnixNano() function in Go language is used to yield "t" as a Unix time that is the number of seconds passed from January 1, 1970, in UTC and the output here doesn't rely upon the location connected w 2 min read time.Time.Unix() Function in Golang with Examples In Go language, time packages supplies functionality for determining as well as viewing time. The Time.Unix() function in Go language is used to yield "t" as a Unix time that is the number of seconds passed from January 1, 1970, in UTC and the output here doesn't rely upon the location connected wit 2 min read time.Time.Truncate() Function in Golang with Examples In Go language, time packages supplies functionality for determining as well as viewing time. The Time.Truncate() function in Go language is used to find the output of rounding the stated time "t" to the closest multiple of the given duration "d" from the zero time. Moreover, this function is define 2 min read Like