out of the blue

Etymology
Short for out of the blue sky, likening an unexpected event to lightning or rain coming suddenly from a cloudless sky.

Prepositional phrase

 * 1)  Unexpectedly; without warning or preparation.
 * After I hadn’t heard from her in six months, she called me out of the blue to meet for lunch.
 * I really can't understand how something like this could simply pop up out of the blue.

Translations

 * Afrikaans: uit die bloute
 * Chinese:
 * Mandarin: ,
 * Czech: zčistajasna
 * Danish: ud af det blå
 * Dutch: uit het niets,
 * Esperanto:
 * Finnish:, kuin salama kirkkaalta taivaalta
 * French: like a hair in the soup,  like a dog in a bowling game,
 * German: (wie) aus heiterem Himmel, (wie) aus blauem Himmel, (wie) aus dem Nichts, aus dem Blauen heraus
 * Hindi:
 * Hungarian: a semmiből,, ,
 * Icelandic: like thunder from a clear sky eins og þruma úr heiðskíru lofti, like the devil from the sheep's leg eins og skrattinn úr sauðaleggnum, sem reiðarslag,  eins og þruma úr heiðríkju, öllum að óvörum
 * Italian:, all of a sudden, come un fulmine a ciel sereno like a thunder in a clear sky, dal nulla
 * Japanese: 藪から棒,
 * Korean:
 * Latin: inexspectate
 * Lithuanian: lyg perkūnas iš giedro dangaus like a thunder in the clear sky
 * Maori: matawhawhati, whāia (nei) ka/kua
 * Norwegian: ut av det blå,
 * Polish:, ni stąd, ni zowąd
 * Portuguese: out of nowhere, da cartola out of the top hat,
 * Romanian: din senin
 * Russian: как гром среди ясного неба like a thunder in the clear sky, как снег на голову like snow onto the head
 * Serbo-Croatian:
 * Cyrillic: ка̏о гро̑м из ве̏дра не̏ба like a thunder from clear skies
 * Roman: kȁo grȏm iz vȅdra nȅba
 * Spanish: de la nada, ,
 * Swedish: like a lightning bolt out of a clear sky
 * Tamil:
 * Telugu:
 * Ukrainian:, як грім з ясного неба
 * Vietnamese: đang không