Some prefer to grind it out on the weekends or in the wee small hours of the morning. (inc.com)
I used to work to the wee small hours of the morning, and still do sometimes if I have deadlines to meet or before an upcoming fair maybe, but I try to do that less often now as it was beginning to take its toll. (blog.folksy.com)
But nor can one imagine Merkel feasting with evident enjoyment till the small hours of the morning with foreign heads of state, as Kohl did. (firstthings.com)