[INTERVAL] [BEGIN] [END]

Interval:

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

Begin:

from <SPEC>
since <SPEC>

The end time can be either of:

to <SPEC>
until <SPEC>

Spec:

2004
2004/10
2004/10/1
10/1
october
oct
this week  # or day, month, quarter, year
next week
last week

Examples:

$ ledger r -p "since last month"

See: http://ledger-cli.org/3.0/doc/ledger3.html#Period-Expressions