# before the decree takes effect

"before Yahweh punishes you"

# that day

This phrase relates to the "day of Yahweh." Translate as you did in Zephaniah 1:9.

# that day passes like the chaff

"that day passes as quickly as chaff blown by the wind"

# before the fierce anger of Yahweh's wrath comes upon you, before the day of Yahweh's wrath comes upon you

The prophet repeats the same phrase to emphasize how terrible Yahweh's judgment will be and the urgency with which the people must repent.

# Yahweh's wrath

"Yahweh's punishment"