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Add Compare The Equality Of Two Date Objects as a javascript til

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# Compare The Equality Of Two Date Objects
Equality can always feel like a bit of a moving target in JavaScript. Comparing
two objects, even if visually/conceptually identical, will resolve to being not
equal.
To compare two `Date` objects, you first need to convert them to something we
can check for equality -- numbers. This can be done with `getTime()`.
```javascript
> now = Date.now()
> today1 = new Date(now)
> today2 = new Date(now)
> today1 === today2
false
> today1.getTime() === today2.getTime()
true
```
With `Date` objects, you can directly use `<`, `>`, `<=`, and `>=`.
[source](https://stackoverflow.com/questions/492994/compare-two-dates-with-javascript)