One of the mysteries of the English language finally explained.
Rogation week, during which the Gang Days fall.
Old English. From gang + week; for the semantic motivation see Gang Day. In later use perhaps after Gang Day. Compare German Gangwoche, Swedish gång-vecka; also Old Icelandic gangdaga-vika, Swedish gång-dags-vecka.
Gang Week/ˈɡaŋ wiːk/
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