Gang-dagas

According to the Old English Dictionary:

gong-dagas;

gang-dagas

pl. m. [dæg a day] Perambulation days, the three days before Ascension day or Holy Thursday, Rogation days, when the boundaries of parishes and districts were traversed; dies perambŭlātiōnes vel processiōnis, rogātiōnum dies :-- Betweox gang-dagum and middum sumera betwixt Rogation days and Midsummer, Chr. 913; Erl. 102, 3 : 1063; Erl. 195, 7. Ofer gang-dagas after Rogation days, L. Ath. i. 13; Th. i. 206, 15. Ðys Gódspel sceal to Gang-dagon this Gospel must be on the Rogation days [Gang-days], Rubc. Mt. Bos. 7, 7-14, notes, p. 575. Ðis sceal to Gang-dagon ðæge twegen dagas, this [Gospel] must be on the two days of the Rogation days, Rubc. Lk. Bos. 11, 5-13? notes, p. 578. [Icel. gangdagar.] gang-dagas