Here are the Swedish holidays 2026-2030. I hope they can be useful.
/Hans
<date year="2026" month="01" day="01" name="Nyårsdagen"/>
<date year="2026" month="01" day="06" name="Trettondagen"/>
<date year="2026" month="04" day="03" name="Långfredagen"/>
<date year="2026" month="04" day="05" name="Påskdagen"/>
<date year="2026" month="04" day="06" name="Annandag påsk"/>
<date year="2026" month="05" day="01" name="Första maj"/>
<date year="2026" month="05" day="14" name="Kristi himmelsfärd"/>
<date year="2026" month="05" day="24" name="Pingstdagen"/>
<date year="2026" month="06" day="06" name="Sveriges nationaldag"/>
<date year="2026" month="06" day="19" name="Midsommarafton"/>
<date year="2026" month="06" day="20" name="Midsommardagen"/>
<date year="2026" month="10" day="31" name="Alla helgons dag"/>
<date year="2026" month="12" day="24" name="Julafton"/>
<date year="2026" month="12" day="25" name="Juldagen"/>
<date year="2026" month="12" day="26" name="Annandag jul"/>
<date year="2026" month="12" day="31" name="Nyårsafton"/>
<date year="2027" month="01" day="01" name="Nyårsdagen"/>
<date year="2027" month="01" day="06" name="Trettondagen"/>
<date year="2027" month="03" day="26" name="Långfredagen"/>
<date year="2027" month="03" day="28" name="Påskdagen"/>
<date year="2027" month="03" day="29" name="Annandag påsk"/>
<date year="2027" month="05" day="01" name="Första maj"/>
<date year="2027" month="05" day="06" name="Kristi himmelsfärd"/>
<date year="2027" month="05" day="16" name="Pingstdagen"/>
<date year="2027" month="06" day="06" name="Sveriges nationaldag"/>
<date year="2027" month="06" day="25" name="Midsommarafton"/>
<date year="2027" month="06" day="26" name="Midsommardagen"/>
<date year="2027" month="11" day="06" name="Alla helgons dag"/>
<date year="2027" month="12" day="24" name="Julafton"/>
<date year="2027" month="12" day="25" name="Juldagen"/>
<date year="2027" month="12" day="26" name="Annandag jul"/>
<date year="2027" month="12" day="31" name="Nyårsafton"/>
<date year="2028" month="01" day="01" name="Nyårsdagen"/>
<date year="2028" month="01" day="06" name="Trettondagen"/>
<date year="2028" month="04" day="14" name="Långfredagen"/>
<date year="2028" month="04" day="16" name="Påskdagen"/>
<date year="2028" month="04" day="17" name="Annandag påsk"/>
<date year="2028" month="05" day="01" name="Första maj"/>
<date year="2028" month="05" day="25" name="Kristi himmelsfärd"/>
<date year="2028" month="06" day="04" name="Pingstdagen"/>
<date year="2028" month="06" day="06" name="Sveriges nationaldag"/>
<date year="2028" month="06" day="23" name="Midsommarafton"/>
<date year="2028" month="06" day="24" name="Midsommardagen"/>
<date year="2028" month="11" day="04" name="Alla helgons dag"/>
<date year="2028" month="12" day="24" name="Julafton"/>
<date year="2028" month="12" day="25" name="Juldagen"/>
<date year="2028" month="12" day="26" name="Annandag jul"/>
<date year="2028" month="12" day="31" name="Nyårsafton"/>
<date year="2029" month="01" day="01" name="Nyårsdagen"/>
<date year="2029" month="01" day="06" name="Trettondagen"/>
<date year="2029" month="03" day="30" name="Långfredagen"/>
<date year="2029" month="04" day="01" name="Påskdagen"/>
<date year="2029" month="04" day="02" name="Annandag påsk"/>
<date year="2029" month="05" day="01" name="Första maj"/>
<date year="2029" month="05" day="10" name="Kristi himmelsfärd"/>
<date year="2029" month="05" day="20" name="Pingstdagen"/>
<date year="2029" month="06" day="06" name="Sveriges nationaldag"/>
<date year="2029" month="06" day="22" name="Midsommarafton"/>
<date year="2029" month="06" day="23" name="Midsommardagen"/>
<date year="2029" month="11" day="03" name="Alla helgons dag"/>
<date year="2029" month="12" day="24" name="Julafton"/>
<date year="2029" month="12" day="25" name="Juldagen"/>
<date year="2029" month="12" day="26" name="Annandag jul"/>
<date year="2029" month="12" day="31" name="Nyårsafton"/>
<date year="2030" month="01" day="01" name="Nyårsdagen"/>
<date year="2030" month="01" day="06" name="Trettondagen"/>
<date year="2030" month="04" day="19" name="Långfredagen"/>
<date year="2030" month="04" day="21" name="Påskdagen"/>
<date year="2030" month="04" day="22" name="Annandag påsk"/>
<date year="2030" month="05" day="01" name="Första maj"/>
<date year="2030" month="05" day="30" name="Kristi himmelsfärd"/>
<date year="2030" month="06" day="09" name="Pingstdagen"/>
<date year="2030" month="06" day="21" name="Midsommarafton"/>
<date year="2030" month="06" day="22" name="Midsommardagen"/>
<date year="2030" month="06" day="06" name="Sveriges nationaldag"/>
<date year="2030" month="11" day="02" name="Alla helgons dag"/>
<date year="2030" month="12" day="24" name="Julafton"/>
<date year="2030" month="12" day="25" name="Juldagen"/>
<date year="2030" month="12" day="26" name="Annandag jul"/>
<date year="2030" month="12" day="31" name="Nyårsafton"/>