Is it a compact YYYYMM year-month?

Six digits: a four-digit year (1900-2099) followed by a two-digit month (01-12), e.g. a fiscal reporting period like 201912. Constrained to a sane year window and a valid month so it does not swallow arbitrary six-digit counts.

Usage

is_yyyymm(x)

Arguments

x

A character vector.

Value

Logical vector; TRUE for a valid YYYYMM string.

See also

Other datetime detectors: is_abbr_month_date(), is_clock_time(), is_date(), is_date_range(), is_day_of_week(), is_fiscal_year(), is_hijri_date(), is_iso_date(), is_iso_datetime(), is_long_date(), is_month_day(), is_month_of_year(), is_month_year(), is_quarter(), is_rfc2822_datetime(), is_us_date(), is_us_datetime()

Examples

is_yyyymm(c("201912", "201301", "201913", "2019", NA))
#> [1]  TRUE  TRUE FALSE FALSE    NA