Where term dates are harmonised and published in advance, business, tourism and transport are also able to benefit from being able to properly plan for the holiday periods.
Pan fo dyddiadau tymhorau'n cael eu cysoni a'u cyhoeddi ymlaen llaw, mae busnesau, twristiaeth a thrafnidiaeth hefyd yn gallu elwa o allu cynllunio'n iawn ar gyfer cyfnodau'r gwyliau.