18 Medi yw'r unfed dydd a thrigain wedi'r dau gant (261ain) o'r flwyddyn yng Nghalendr Gregori (262ain mewn blynyddoedd naid).
Erys 104 diwrnod hyd diwedd y flwyddyn.
Enghraifft o'r canlynol | pwynt mewn amser mewn perthynas ag amserlen gylchol |
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Math | 18th |
Rhan o | Medi |
Ffeiliau perthnasol ar Gomin Wicimedia |
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Rhestr holl ddyddiau'r flwyddyn |
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