Fortnight
The word *fortnight* — meaning a period of fourteen days — is among the clearest survivals of an ancient Germanic habit of reckoning time by nights rather than days. It descends without interruption from Old English *fēowertyne niht*, a compound of *fēowertyne* (fourteen) and *niht* (night), the whole meaning literally 'fourteen nights.' That this compound was felt as a natural and necessary unit of time tells us something profound about how the Germanic peoples organised their experience of duration.
The Night-Count: Tacitus and the Germanic World
The practice is old enough to have attracted the attention of Roman observers. In his *Germania* (ch. 11), written around AD 98, Tacitus records of the Germanic tribes: *nec dierum numerum, ut nos, sed noctium computant* — 'they count not the number of days, as we do, but of nights.' For Tacitus this was a curiosity, a marker of difference between Roman solar reckoning and Germanic lunar habit. For the philologist it is a precious piece of external evidence confirming what the vocabulary itself announces: that Germanic time was measured in the dark half first.
This is not mere antiquarian trivia. The linguistic habit reflects a cosmological orientation. In the old Germanic world, and in the older Indo-European world before it, the night preceded the day as the womb precedes the child. The day was born from the night. We see the same logic preserved in the Old Norse division of the calendar, in the Old English term *Mōdraniht* ('Mothers' Night') marking the beginning of the new year in darkness, and in the Celtic equivalent still visible in *Samhain* and its descendant Halloween — the feast begins at nightfall, for the new period is counted from its dark beginning.
Sennight: The Companion Reckoning
*Fortnight* did not stand alone. Its natural companion was *sennight* — from Old English *seofon niht*, 'seven nights' — which denoted a week. Both compounds operated on identical principles and both were in common use through the medieval period. *Sennight* has now largely disappeared from living English except in archaic or literary contexts, while *fortnight* has held on with remarkable tenacity, particularly in British and Commonwealth usage. The asymmetry of their fates is instructive: the week as a unit was eventually covered by the Latin-derived borrowing *week* (itself from Old English *wicu*, related to Gothic *wikō*), while the fortnight had no single-word competitor and so retained its position.
Germanic Cognates Across the Family
The formation in Old English was not an isolated coinage. The same compounding instinct produced parallel formations across the Germanic family. In German, while no single contracted word corresponding to *fortnight* became standard, the phrase *vierzehn Nächte* (fourteen nights) serves the same function in elevated or precise usage, and *in vierzehn Tagen* (in fourteen days) is the ordinary way to say 'in a fortnight.' Old Norse had *fjögurra nátta* (of four nights) in the counting of the old lunar week, and the longer *fjórtán nætr* (fourteen nights) could be deployed for the same span. The Dutch *veertien nachten* follows the same template. Across the whole breadth of the Germanic-speaking world, the practice of naming multi-day spans by their night-count was natural, grammatically automatic, productive.
What varied was which of these formations survived into the modern period as a lexicalised unit. English, through the path of *fēowertyne niht* > Middle English *fourteniht* > *fortenight* > *fortnight*, carried the two-week unit all the way to the present day as a single opaque word, its compositional origins visible only on inspection.
The Middle English Contraction
The passage from the Old English compound to the modern word is a tidy history of phonological compression. The full form *fēowertyne niht* in late Old English and early Middle English was already being reduced in rapid speech. By the thirteenth and fourteenth centuries the spelling *fourteniht* is common in the records, and the medial syllable continues to wear down. The loss of the internal -en- cluster and the reduction of *niht* to a syllable without its palatal fricative gave the form *fortnicht* in northern dialects and eventually *fortnight* in the standard. The -gh- spelling preserves the memory of the Old English *h* in *niht*, the same sound that survives in Scots *nicht* and German *Nacht*.
British Retention, American Loss
That *fortnight* thrives in British English but has largely dropped from American English is a sociolinguistic fact of some interest. American English shows a general tendency to prefer explicit counting — 'two weeks' rather than 'a fortnight' — and the word never took firm root in the colonial and post-colonial American vocabulary in the way it did in Britain and the Commonwealth nations. Australian, New Zealand, South African, and Indian English all use *fortnight* naturally; American English treats it as a Briticism. This divergence reflects not a change in the concept but a change in tolerance for inherited compact forms: American English, shaped by its pluralistic origins and its preference for analytical construction, let the old compound go, while the dialects maintaining closer continuity with British usage retained it.
A Word That Carries Its Culture
To say *fortnight* is, without knowing it, to invoke a very old Germanic sense of time — one in which darkness sets the rhythm and the night precedes and generates the day. The word is a compressed cultural document. Its components, once unpacked, open directly onto the observations of Tacitus, onto the structure of the old lunar calendar, onto a world in which festivals began at sunset and the year turned in midwinter night. The contraction that turned *fēowertyne niht* into *fortnight* sealed that knowledge inside the word, making it available to whoever cares to break it open.