I think this is a change for the better. I was initially a little leery when I saw the title but I appreciate the attention to detail. I now live in St. Louis and there have been a number of times when I read the St. Louis Post Dispatch on-line and have experienced some confusion as to when the event actually occurred.

Given that the feature in the May 2nd "G" section of the Globe about the Cinco de Mayo celebration at Angela's Cafe in East Boston stated that it will be held on April 7th, it might also be worth checking that future tense verbs have object dates that are in the future. (The electronic edition caught the error and noted an erratum. Cinco de Mayo continues to be May 5th!) Because electronic media may be read anywhere on the planet, it becomes important that references to time and to date be absolute rather than relative. The Globe is to be commended for recognizing this and adopting the style noted in your "To Grammar's House" column.