# [Swift Tips] Validate Date is effective with start date and end date

###### tags: `Swift-Tips`

### Use Case
Validate target date is between start date and end date.

Example:
> start: 2020.0617 <br/>
> end: 2020.0619 <br/>
> validate target date: 2020.0618

### Demo

let now = Date()
let isEffective = (start...end).contains(now)

### Relative Classes
[[Swift.Date]]

---

### Playground

import Foundation

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy/MM/dd"
let yesterDayString = "2020/06/18"
let yesterDay = dateFormatter.date(from: yesterDayString)!

let tomorrowString = "2020/06/20"
let tomorrow = dateFormatter.date(from: tomorrowString)!


let now = Date()

let isEffective = (yesterDay...tomorrow).contains(now)
print(isEffective)