epochal

English Thesaurus

1. highly significant or important especially bringing about or marking the beginning of a new development or era (adj.all)

similar	:	important, significant,
definition	:	important in effect or meaning (adj.all)

derivation	:	epoch, era,
definition	:	a period marked by distinctive character or reckoned from a fixed point or event (noun.time)

derivation	:	epoch, era,
definition	:	a period marked by distinctive character or reckoned from a fixed point or event (noun.time)