<h2>options</h2>

<p>format</p>
```
var DT = Y.DataType.Date;

var to = new Date('2012-04-04T12:00Z'),
    format;

format = '%x';
DT.format(to, { format: format });
// output: 04/04/12

format = '%Y-%m-%d %H%P';
DT.format(to, { format: format });
// output: 2012-04-04 05am
```

<p>relativeDelta</p>
```
var DT = Y.DataType.Date;

var to = new Date('2012-05-01T13:00Z'),
    delta = 3 * 60 * 60, // 3 hours in seconds
    from;

from = to;
DT.format(to, { relativeDelta: delta, from: from });
// output: right now

from = new Date('2012-05-01T13:00:10Z');
DT.format(to, { relativeDelta: delta, from: from });
// output: less than a minute before

from = new Date('2012-05-01T13:10Z');
DT.format(to, { relativeDelta: delta, from: from });
// output: 10 minutes before

from = new Date('2012-05-01T14:00Z');
DT.format(to, { relativeDelta: delta, from: from });
// output: about an hour before

from = new Date('2012-05-01T16:00Z');
DT.format(to, { relativeDelta: delta, from: from });
// output: about 3 hours before
```

<p>from</p>
usually created for testing purpose

```
var DT = Y.DataType.Date;

var to = new Date('2012-04-04T12:00Z'),
    from;

from = to;
DT.format(to);
// output: 2012-04-04
```