function isBoolean(value) {
      return value === true || value === false ||
        (isObjectLike(value) && baseGetTag(value) == boolTag);
    }
Checks if `value` is classified as a `Date` object.

@static
@memberOf _
@since 0.1.0
@category Lang
@param {*} value The value to check.
@returns {boolean} Returns `true` if `value` is a date object, else `false`.
@example

_.isDate(new Date);
// => true

_.isDate('Mon April 23 2012');
// => false