[INTERVAL] [BEGIN] [END]
every day every week every month every quarter every year every N days # N is any integer every N weeks every N months every N quarters every N years daily weekly biweekly monthly bimonthly quarterly yearly
from <SPEC> since <SPEC>
The end time can be either of:
to <SPEC> until <SPEC>
2004 2004/10 2004/10/1 10/1 october oct this week # or day, month, quarter, year next week last week
$ ledger r -p "since last month"