The organisers of ARC decided on Saturday to delay the start for the Cruising division until Tuesday.
The reason is that strong headwind (+35 knots) is expected in the wind acceleration zone between Gran Canaria and Tenerife.
The racing division starts as normal today. The cruising division can choose to start today, or wait until Tuesday. Most boats are expected to wait until Tuesday.
I think this is a good decision from the ARC team. I see no point starting an Atlantic crossing in strong head winds, when you can sail downwind two days later.