---
id: interval
title: Interval
---

```js
type interval = {
  start: Js.Date.t,
  end_: Js.Date.t,
}
```

### isWithinInterval

Is the given date within the interval?

```js
let isWithinInterval: (Js.Date.t, interval) => bool
```

```js
let interval = {
  start: Js.Date.makeWithYMD(~year=2018., ~month=3., ~date=1., ()),
  end_: Js.Date.makeWithYMD(~year=2018., ~month=4., ~date=10., ()),
}
let date = Js.Date.makeWithYMD(~year=2018., ~month=0., ~date=5., ())

date->ReDate.isWithinInterval(interval)
```

### areIntervalsOverlapping

the given time interval overlapping with another time interval?

```js
let areIntervalsOverlapping: (interval, interval) => bool
```

```js
let interval = {
  start: Js.Date.makeWithYMD(~year=2018., ~month=3., ~date=1., ()),
  end_: Js.Date.makeWithYMD(~year=2018., ~month=4., ~date=10., ()),
}
let includedInterval = {
  start: makeWithYMD(~year=2018., ~month=3., ~date=5., ()),
  end_: makeWithYMD(~year=2018., ~month=4., ~date=5., ()),
}

interval->ReDate.areIntervalsOverlapping(includedInterval)
```

### getOverlappingDaysInIntervals

Get the number of days that overlap in two time intervals.

```js
let getOverlappingDaysInIntervals: (interval, interval) => float
```

```js
let interval = {
  start: Js.Date.makeWithYMD(~year=2018., ~month=3., ~date=1., ()),
  end_: Js.Date.makeWithYMD(~year=2018., ~month=4., ~date=10., ()),
}
let includedInterval = {
  start: Js.Date.makeWithYMD(~year=2018., ~month=3., ~date=5., ()),
  end_: Js.Date.makeWithYMD(~year=2018., ~month=3., ~date=15., ()),
}

interval->ReDate.getOverlappingDaysInIntervals(includedInterval)
```

### eachDayOfInterval

Return the array of dates within the specified time interval.

```js
let eachDayOfInterval: interval => array<Js.Date.t>
```

```js
let interval = {
  start: Js.Date.makeWithYMDHMS(~year=2018., ~month=0., ~date=1., ~hours=19., ~minutes=30., ~seconds=22., ()),
  end_: Js.Date.makeWithYMDHMS(~year=2018., ~month=0., ~date=5., ~hours=8., ~minutes=45., ~seconds=15., ()),
}

interval->ReDate.eachDayOfInterval
```