The important thing to glean from the 2nd narrative panel above is that for story purposes we are rewinding about a month.
Also, terms like "hour," "day" and "month" are translated from Galstandard West into the crude English of our 21st-century readers. Just as Americans with no proper set of metric measuring cups get confused and flustered by recipes calling for grams of this and milliliters of that, pre-Contact Earthlings with no proper Galro Calendar will get depressed when they can't figure out where their next three-day weekend is coming from.