A good question for any day, but especially so when the news media reports on events that should make most anyone angry. Terrorist acts, deaths of children, persecution of Christians, lies of politicians, a bright sunny day in a place where you ain't - there is usually something for everyone when it comes to anger. Jesus felt anger too.
In and of itself, anger is not sin, for we know that Jesus never sinned. We can be angry when anger is called for, but the peace Jesus gave to us should always return. Remaining angry for too long tends to cause damage both inside and out. Jesus even told us to be angry and sin not (by David in the Psalms (4:4) and Paul quoting the psalm in his letter to the Ephesians (4:26)). The second part of David's verse tells us a valuable insight: "Meditate within your heart on your bed, and be still."
After the anger comes, we may need at times to repair to the bed for some meditation alone with God heart to heart. I have at times found to my embarrassment that my anger was unjustified and myself just downright in the wrong. Of course, if the anger is directed at God, we are always going to end up that way.Enjoy a peaceful day in Christ!