The Significance of the 25th of Kislev and the Mishkan

שמות לט,לב : וַתֵכֶל כָּל־עֲבֹדַת מִשְכַן

The Baal HaTurim notes that the above phrase has the Gematria of 1392 which is equal to that phrase בעשרים וחמשה בכסלו נגמר (on the 25th of Kislev it was finished).

This refers to the Medrash that states that the work of making the components of the Mishkan was completed on the 25th of Kislev. However, HaShem delayed its inauguration until Nissan. Since this day was deprived of the inauguration, HaShem repaid that day in the time of the miracle of Chanukah when they rededicated the Bais haMikdash on that day.