How to add/subtract days, months or years to a date in Go Language

Hello everyone, In this tutorial, we will learn how to add/subtract days, months or years to a date in Go Language.

The time package in Go language provides AddDate() function which is used to add/subtract years, months and days to time t. 

The signature of the AddDate method is:

func (t Time) AddDate(years int, months int, days int) Time

Example 1: Go Program to add/subtract days.

package main
import (
    "fmt"
    "time"
)
func main() {
    //Current date and time
    dt1 := time.Now()
    fmt.Println("Current date and time : ", dt1)
    //Adding 3 days
    dt2 := dt1.AddDate(0, 0, 3)
    fmt.Println("After three days: ", dt2)
    //Subtract 400 days
    dt3 := dt1.AddDate(0, 0, -400)
    fmt.Println("Before 400 days: ", dt3)
}

Output:

Example 2: Go Program to add/subtract months.

package main
import (
    "fmt"
    "time"
)
func main() {
    //Current date and time
    dt1 := time.Now()
    fmt.Println("Current date and time : ", dt1)
    //Adding 3 months
    dt2 := dt1.AddDate(0, 3, 0)
    fmt.Println("After three months: ", dt2)
    //Subtract 9 months
    dt3 := dt1.AddDate(0, -9, 0)
    fmt.Println("Before 9 months: ", dt3)
}

Output:

Example 3: Go Program to add/subtract years.

package main
import (
    "fmt"
    "time"
)
func main() {
    //Current date and time
    dt1 := time.Now()
    fmt.Println("Current date and time : ", dt1)
    //Adding 2 years
    dt2 := dt1.AddDate(2, 0, 0)
    fmt.Println("After two years: ", dt2)
    //Subtract 7 years
    dt3 := dt1.AddDate(-7, 0, 0)
    fmt.Println("Before 7 years: ", dt3)
}

Output: