The historical runes served language and charms rather than a standardized oracle. In modern rune divination Dagaz is commonly read for breakthrough, awakening, daylight and transformation, the turning point at which darkness gives way. These keyword meanings belong to the twentieth-century reconstructionist and esoteric revival, popularized after 1982, and are offered here as a symbolic tradition rather than an ancient practice or a claim of foretelling.
Dagaz's Old English stanza is among the most straightforwardly positive in the whole poem, day as universal blessing rather than as a possession or virtue belonging to any one class of person, and the modern divinatory keyword sense of Dagaz as breakthrough and awakening follows this positive attestation closely. Dagaz is also, in the modern rune-divination tradition rather than in any ancient source, sometimes treated as a natural closing rune for a reading given its position as the second-to-last symbol before Othala completes the Elder Futhark's twenty-four.
The Armanen-descended rune-magic tradition transmitted into English chiefly through Thorsson's work also treats Dagaz as usable actively rather than only read passively: chanted aloud as galdr, or carved into wood, metal or a bind-rune combining several staves, for an intended practical effect. No source earlier than the twentieth century attests any such active magical use of this specific rune, and the practice should be understood as a modern reconstruction built on the reconstructed name and the rune poems rather than as a recovered ancient technique.