Night is not tsitsis time. According to the Rambam – it’s the time of day that determines your obligation. According to the Rosh – it’s the type of begged that determines your obligation. (ShA1)
Be machmir on a nighttime begged during the day and a daytime begged at night to hang tsitsis on them. (MB2)
Be maykil in the aforementioned cases not to say a beracha on the tsitsis. Only say a beracha on a daytime begged during the day. (Rama 1)
Don’t say a beracha on the tsitsis after davening Maariv, even if it is still daytime. (Rama 1)
A shaliach tzibbur who is not wearing a jacket is not respecting the tzibbur, he therefore should wear a tallis even at night. Any shaliach tzibbur should wear a tallis. (MB4,5)
On Kol Nidray night, put on the tallis and say the beracha while still day. If you aren’t sure if the sun set or not, you can still say the beracha. Don’t remove it until after Maariv Motsay Yom Kippur so you can resemble an angel. (Rama1 – MB 6,7)
Woolen bedding that has four corners – round off one of them. (MB8)
Daytime (for the beracha) is in the morning, when it’s light enough to recognize the difference between techayles strings and the white strings. (The earliest: 60 min before sunrise) (ShA 3)
It is best to wait to put on the tallis until after the above time. If you are already wearing the tallis before this time, when daytime comes, feel your tstsis and say the beracha. (MB10)