Days Before Date

daysbeforedate.go

package main

import (
	"fmt"
	"time"
)

func daysFromNow(targetTime time.Time) int {
	// Convert to capture date only, without time
	year, month, day := time.Now().Date()
	reducedNow := time.Date(year, month, day, 0, 0, 0, 0, time.UTC)

	targetYear, targetMonth, targetDay := targetTime.Date()
	reducedTargetTime := time.Date(targetYear, targetMonth, targetDay, 0, 0, 0, 0, time.UTC)

	duration := reducedTargetTime.Sub(reducedNow)

	daysDifference := int(duration.Hours() / 24)

	return daysDifference
}

func main() {
	targetDate := time.Date(2023, time.July, 15, 23, 0, 0, 0, time.UTC)
	difference := daysFromNow(targetDate)
	fmt.Println(fmt.Sprintf("D-%v", difference))
}