FormattedDateRange
Renders start–end as a single date when they fall on the same day, and collapses shared year/month for the fi locale (e.g. "1.–3.5.2026").
- Same day, locale="fi":
- Same month & year, locale="fi": –
- Same year, different months, locale="fi": –
- Different years, locale="fi": –
- Same range, locale="en" (no fi-specific collapsing): –
- Only
start given, locale="fi": - Only
end given, locale="fi":