Henock 72:17-18 (from the Ethiopian text, numbering by R.H Charles)
17. And the sun goes forth from that sixth portal in the west, and goes to the east and rises in the fifth portal for thirty mornings, and sets in the west again in the fifth western portal. 18. On that day the day decreases by two parts, and amounts to ten parts and the night to eight parts.
[5th month: sunrises & sunsets on the 5th gate (sunrise from east to north-east) ; has 30 days; day = 11 parts & night = 7 parts (14 hours of daylight); day becomes shorter by 2 part]