cdm/src/main/java/ucar/nc2/units/SimpleUnit.java
static public boolean isTimeUnit(String unitString) {
    SimpleUnit su = factory(unitString);
    return su != null && isTimeUnit(su.getUnit());
  }
static public boolean isTimeUnit(String unitString) {
    SimpleUnit su = factory(unitString);
    return su != null && isTimeUnit(su.getUnit());
  }
Return true if the given unit is a time Unit, eg "seconds".

@param unitString check this unit string
@return true if its a Time