John Gill Commentary Mark 13:18

"And pray ye that it be not in the winter." — Mark 13:18 (ASV)

And pray you that your flight be not in winter . ] When days are short, roads bad, the weather inclement; and when to lodge in mountains, is very incommodious, and uncomfortable. The Persic version adds, "neither on the sabbath day"; (See Gill on Matthew 24:20).