Years ago, I had a discussion with a friend of mine in England. In fact, it was in January of 2012 when we talked about how we were both waking up between 2-5, and sometimes exactly at 4:00 a.m.
For awhile, I got up and prayed, especially if God was bringing someone or something to my mind.
Moving around so much in the past four years has interfered with me responding to this call "to keep vigil with Christ" as Father Xavier called it.
Now, I have met several other people, both men and women, who tell me that are waking up at 4 or so. We all agree, but one who still is not sure, that God is calling us to pray at that time.
One of this group found out that people who are going to commit suicide do so at these times, 2-5.
Another person thought of being in the Garden of Gethsemane. Maybe Christ just wants us to be with Him, as if we were in the Garden, but not falling asleep like the apostles.
I must admit this is very, very hard for me, as I only get about six to seven hours of sleep a night as it is owing to doing so many things. Interrupted sleep can only be called "difficult".
But, if God is waking one up, one must get up and pray.
I cannot do a rosary at that hour, usually, unless I am well-rested, but I can turn my mind towards Christ and pray for those people who do come to my mind at those wee hours of the morning....
To do vigil with Christ means that He is begging us to join Him in His Passion, to do what St. Paul indicates here: