name the day
Fix the date for a wedding, as in Her parents pressed her to name the day. This expression was first recorded in 1766. However, similar usages for specifying a time, such as name the time, date from the late 1500s.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.