Announced by Dylan Thomas's granddaughter in December last year, the Welsh Government and Literature Wales' annual celebration reflects the date Under Milk Wood was first read on stage in New York in 1953.
While events across the world are being held, devoted Dylan fans are tweeting their favourite quotes from the pen and lips of the man himself.
From the magical lilts of Under Milk Wood to the poet's dramatic descriptions of himself, these are some of the most inspiring quotes fans have been sharing on #DylanDay.
"Time held me green and dying, though I sang in my chains like the sea" #DylanDay
- Hannah Jones (@MissJonesxx) May 14, 2015
"While the boys among willows Made the tigers jump out of their eyes" #DylanDay
- Catrin James (@CatrinSaran) May 14, 2015
"I saw you talking to a saint this morning. Saint Polly Garter. She was martyred again last night in Milk Wood" #milkwood #DylanDay
- Mrs Pugh (@MrsPugh_) May 14, 2015
"Organ Morgan at his bedroom window playing chords on the sill to the morning fishwife gulls" #milkwood #DylanDay
- First Voice (@FirstVoice_) May 14, 2015
"We shall ride out alone, and then, under the stars of Wales, cry multitudes of arks!" #DylanDay
- Jason Evans (@EvansTheCrime) May 14, 2015
"finds a rhyme and dips his pen in his cocoa" #milkwood #DylanDay
- Reverend Eli Jenkins (@Rev_EliJenkins) May 14, 2015
"Do not go gently into that good night, but rage, rage against the dying of the light." #DylanDay #DylanThomas #foreveryoung #Wales
- Chris Saunders (@CMSaunders01) May 14, 2015
"Mrs Ogmore-Pritchard belches in a teeny hanky and chases the sunlight with a flywhisk" #milkwood #DylanDay
- First Voice (@FirstVoice_) May 14, 2015
"A good a day as any to sing in my chains like the sea" #DylanDay
- The Lone Reader (@lonereaderblog) May 14, 2015
"Happy International Dylan Thomas Day" #DylanDay
- Kim Thomas (@xlilangel4lyfx) May 14, 2015
"The sunny slow lulling afternoon yawns and moons … The sea lolls, laps and idles in, with fishes sleeping in its lap" #milkwood #DylanDay
- First Voice (@FirstVoice_) May 14, 2015
