Id say between 8-10pm
In order to get married, yes.
night time
Traditionally they met in the night at Juliet's house on a balcony at a party.
Juliet complains: "Now is the sun upon the highmost hill Of this day's journey, and from nine to twelve Is three long hours; yet she is not come."
Juliet sends the nurse to get information from Romeo regarding when they are to meet to be married. Romeo tells the nurse to tell Juliet to devise a plan to get out of the house and go to the confession later that day. In Friar Lawrence's cell is were they will meet and be married.
Romeo and Juliet plan to get married the following day.
-Romeo attend the Capulet party -Romeo kills Tybalt out of anger and without thinking -Juliet lies to her father about agreeing to marry Paris
Romeo.
Romeo "Is the day so young?"
Romeo speaks first saying "Is the day so young?"(1:1 152)
It gets light which means that the new day is going. Because Romeo was exiled, he has to be gone by that morning, so the lighter it gets the closer to the time Romeo and Juliet have to part.
day symbolizes hatred and fighting because all the fights happen during the day and Romeo and Juliet can't be together during day.