code: function getUTCTime(modelValue) {
        var tempDate = new Date()
        if (modelValue) {
          var tempMoment = getMoment(modelValue)
          if (tempMoment.isValid()) {
            tempDate = tempMoment.toDate()
          } else {
            throw new Error('Invalid date: ' + modelValue)
          }
        }
        return tempDate.getTime() - (tempDate.getTimezoneOffset() * 60000)
      }
docs: Converts a time value to UCT/GMT time.
  @param modelValue
  a time value in any of the supported formats (Date, moment, milliseconds, and string)
  @returns {number}
  number of milliseconds since 1/1/1970