Check if an argument is an ISO 8601 date string

Validates the YYYY-MM-DD format with calendar correctness, including leap year handling.

Usage

is_iso_date(x)

Arguments

x

(any)
Object to check.

Value

TRUE if x is a valid ISO 8601 date string, FALSE otherwise.

References

https://en.wikipedia.org/wiki/ISO_8601

Examples

is_iso_date("2024-01-15")
#> [1] TRUE
is_iso_date("2024-02-30")
#> [1] FALSE