de mane

From dē + māne.

dē māne (not comparable) (Late Latin, proscribed)

1. early in the morning
   • c. 347 CE – 420 CE, Hieronymus, Vulgate Jeremiah.35.14:

     ego autem locutus sum ad vos, de mane consurgens et loquens, et non oboedistis mihi

     notwithstanding I have spoken unto you, rising early and speaking; but ye hearkened not unto me

   • c. 5th century CE, Pompeius Grammaticus, Commentum artis Donati; republished as Heinrich Keil, editor, Grammatici Latini, volume 5, 1868, page 274:

     si est adverbium, multo minus iungis praepositionem. nam legimus praepositionem adverbio non iungi. numquid possum dicere ‘de mane’ et similia?

     If it is an adverb, much less do you join a preposition [to it], for we read that a preposition is not joined to an adverb. Surely I cannot say de mane and suchlike?^[1]

(Sense has shifted to 'tomorrow' across Italo-Western Romance.)

• AIS: Sprach- und Sachatlas Italiens und der Südschweiz [Linguistic and Ethnographic Atlas of Italy and Southern Switzerland] – map 347: “domani” – on navigais-web.pd.istc.cnr.it
• Walther von Wartburg (1928–2002), “de mane”, in Französisches Etymologisches Wörterbuch (in German), volume 3: D–F, page 36