Wikipedia
Faoilleach
Faoilleach or Faoilteach, anglicised as Fulteachs, futtick, furtock etc., is a Scottish Gaelic term which originally referred to a certain period in the agricultural calendar and which refers to the first month of the year, January, in modern Scottish Gaelic.
Nowadays, the term has fallen out of English and Lowland Scots, but is still used in Gaelic for the month of January specifically. It would appear to be a very old term, as it seems to come from faol or faol-chù meaning a wolf, a creature which has been extinct in Scotland for centuries.
The Gael of old regarded stormy weather towards the end of January as prognostic of a fruitful season to follow, or vice versa, as shown in various proverbs.