cold day in Hell

Noun

 * 1)  The time of occurrence of an event that will never happen.
 * It'll be a cold day in hell when that happens.

Translations

 * Basque: haizerik ez den urtean
 * Belarusian: калі рак свісне
 * Bulgarian: кога́то цъ́фнат налъ́мите
 * Chinese:
 * Mandarin: 绝不可能, 绝无可能
 * Danish: en kold dag i helvede
 * Dutch: met Sint Juttemis; als Pasen en Pinksteren op een dag vallen
 * Esperanto: triĵaŭda semajno
 * Finnish: kun helvetti jäätyy
 * French:, , , aux calendes grecques
 * German: nie im Leben
 * Greek: όταν ασπρίσει ο κόρακας και γίνει περιστέρι
 * Hungarian: majd ha piros hó esik, majd ha cigánygyerekek potyognak az égből, majd ha a pokol befagy
 * Italian: alle calende greche, quando gli asini voleranno
 * Persian: وقت گل نی
 * Polish:
 * Russian: ,
 * Spanish:, cuando meen las gallinas
 * Turkish: kırmızı kar yağınca,
 * Welsh: dydd Sul y pys
 * Zazaki: Vora sur bıvaro, heta ga bızi yo