dst.js

Is it daylight savings time?

Date.prototype.isDST()

Returns true if the date is during daylight savings time.

(window || require('dst')).is_dst(date, [thresholds])

Available either directly via require or on the window object, is_dst
is the function underlying the prototype method.

It accepts an additional thresholds argument, which should take the following
form:

```javascript
{
"spring_forward":,
"fall_back":,
}
``

> ### nota bene
>
> spring_forward need not be before fall_back -- in fact, in 50% of earthly
> hemispheres, it's just the opposite situation.
>
> further, in other saner lands, there may be no thresholds to cross -- that is,
> there are happy, productive human beings that somehow survive without DST.
> in that case, both fields may be set to 0.

is_dst.find_thresholds()

Splits the year in two halves, and attempts to check at which point in the hemi-year
Date#getTimezoneOffset changes values. Run once during the execution of the program.
Uses a binary search -- cuts out at the granularity of one second.

May be used to provide valid thresholds to pass into is_dst, if so desired.

testing

``

$ npm install --dev dst
$ npm test dst

```

LICENSE

MIT