transfer window

Noun

 * 1)  A period of time during which a spacecraft orbiting one celestial body can travel to a different body and enter orbit around it without excessive expenditure of fuel or reaction mass.
 * 2)  A period of time during the year in which soccer players may be bought or sold between professional clubs.

Translations

 * German: Wechselperiode, Transferfenster
 * Icelandic: félagaskiptagluggi
 * Norwegian:
 * Bokmål: overgangsvindu
 * Nynorsk: overgangsvindauga, overgangsvindauge
 * Portuguese: janela de transferências
 * Spanish: ventana de transferencias
 * Swedish:, övergångsfönster