Modern French orthography has restored the spelling une heure.

It was also frequently used in place of a final 'e' (which was still pronounced at the time) when it was elided before a vowel, as in un' heure. Introduced by Geoffroy Tory (1529), the apostrophe was used in place of a vowel letter to indicate elision (as in l'heure in place of la heure). It was introduced into English in the 16th century in imitation of French practice. The apostrophe was first used by Pietro Bembo in his edition of De Aetna (1496). 6.2 Typographic apostrophe in 8-bit encodingsДЇor a detailed list, see Wiktionary:Category:English terms spelled with '.4 Informal use in records of measurement.2.5 Miscellaneous uses in other languages.2.3 As a mark of palatalization or non-palatalization.1.7.1 Superfluous apostrophes ('greengrocers' apostrophes').1.2.5 Possessives in names of organizations.1.2.3 Nouns ending with silent s, x, or z.1.2.2 Singular nouns ending with an 's' or 'z' sound.1.2.1.8 Possessive pronouns and adjectives.1.2.1.6 With other punctuation compounds with pronouns.1.2.1.1 Summary of rules for most situations.1.2.1 General principles for the possessive apostrophe.

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