# cf.dtlt

`cf.``dtlt`(*args, **kwargs)

  Return a `cf.Query` object for a variable being earlier than a date-time.

  `cf.dtlt(*args, **kwargs)` is equivalent to `cf.lt(cf.dt(*args, **kwargs))`.

  See also

  `cf.year`, `cf.month`, `cf.day`, `cf.hour`, `cf.minute`, `cf.second`, `cf.dteq`, `cf.dtge`, `cf.dtgt`, `cf.dtne`, `cf.dtle`

  Parameters: | args, kwargs : Positional and keyword arguments for defining a date-time. See `cf.dt` for details.
  Returns: | out: `cf.Query` The query object.
  Examples: |

      >>> d = cf.dt(2002, 6, 16)
      >>> d == cf.dtlt(1990, 1, 1)
      True
      >>> d == cf.dtlt(2002, 6, 16)
      True
      >>> d == cf.dtlt('2100-1-1')
      False
      >>> d == cf.dtlt('2001-1-1') & cf.dtlt(2010, 12, 31)
      True

  The last example is equivalent to:

      >>> d == cf.wi(cf.dt(2001, 1, 1), cf.dt('2010-12-31'))
      True