Compute the age of a vintage tag in whole months relative to a reference date (defaults to "now").
Returns Number.POSITIVE_INFINITY when the vintage tag is malformed — the caller treats unknown vintages as definitely-stale rather than silently optimistic.
Compute the age of a vintage tag in whole months relative to a reference date (defaults to "now").
Returns
Number.POSITIVE_INFINITYwhen the vintage tag is malformed — the caller treats unknown vintages as definitely-stale rather than silently optimistic.