The day-specifier placeholder represents a range of time in terms of days.
year/month/day | month/day | wday | wday-wday | weekday[s] | weekend[s] | daily | today | yesterday
sun•day[s] | mon•day[s] | tue•sday[s] | wed•nesday[s] | thu•rsday[s] | fri•day[s] | sat•urday[s]
"day-date" describes the possible values for the placeholders year, month, and day.