public long roundCeiling(long instant) { if (iTimeField) { int offset = getOffsetToAdd(instant); instant = iField.roundCeiling(instant + offset); return instant - offset; } else { long localInstant = iZone.convertUTCToLocal(instant); localInstant = iField.roundCeiling(localInstant); return iZone.convertLocalToUTC(localInstant, false, instant); } }