All these times I have are adjusted from "Titanic Time" (the time on the ship as determined by sun/celestial navigation) to modern day time, including DST. Times are Eastern Daylight Time.
April 14, 1912:
11:07 PM - Titanic's lookout spot the iceberg, the order is given to "port 'round" the iceberg but it still hits and the ship begins to take on water.
11:52 PM -After a ship inspection by officers and the ship's architect it's determined the ship will sink, orders are given to start evacuation.
April 15, 1912
12:12 AM - The first signal rocket is launched along with the first lifeboat #7. There are 28 people, the boat can support 65.
12:22 AM - Lifeboats #5 and #6 (41 and 28, respectively in 65-person capacity boats.)
12:27 AM - Lifeboat #3 (40/65)
12:37 AM - Lifeboat #8 (35/65)
12:39 AM - Lifeboat #1 (12/40)
12:47 AM - Lifeboats #9 (56, 65),#10 (55/65). Last distress rocket launched.
12:51 AM - Lifeboats #11 (70/65), #12 (43/65), #14 (60/65)
12:57 AM - Lifeboats #13 (65/65), #15 (70/65)
01:02 AM - Lifeboat #16 (56/65)
01:07 AM - Collapsible Lifeboat C launches. 40 of possible 47 on board/
01:12 AM - Lifeboat #2 (25/40)
01:22 AM - Lifeboat #4 (40/65)
01:32 AM - Collapsible D (44/47). Water is at the bridge.
01:37 AM - Last distress signal is sent, essentially saying it's every man for himself.
01:44 AM - Collapsibles A and B float off the ship. A's sides aren't properly raises and is swamped 30 people would attempt to survive on it and 12 would make it. B floats off the ship upside-down, dozens of people would climb on it and attempt to stay there until dawn when rescue arrived, 28 would survive.
01:45 AM - Titanic's lights flicker and finally go off for good just before the #1 funnel breaks off. The ship's stern continues to rise before the stress on the keel is too much and the ship breaks in two.
April 15, 1912 - 1:46 AM EDT (Adjusted/estimated from "Titanic Time" in 1912.) Titanic has sunk and is making its way to the ocean floor where she will not be discovered until July 1, 1985. 1,557 men, women, and children would succumb to exposure due to the frigid waters of the North Atlantic within minutes. The 705 people in the boats (or rescued from the water/overturned boats) would be picked up by the Carpathia and arrive in New York City three days later.