To qualify for tax relief under Denmark’s Ligningsloven §33A, a qualifying foreign work stay must generally last at least 6 months, with no more than 42 days spent in Denmark during that period. Set the Start Date and End Date to your qualifying foreign-stay period. This tracker monitors the 42-day Denmark limit only; other §33A conditions must also be satisfied.
https://skat.dk/borger/udlandsforhold/du-bor-i-danmark-og-arbejder-i-udlandet