Among other important aspects of Lostislandic culture, the one which deserves special attention is the list of holidays. Being home for various cultures, Lostisland developed its own list of holidays, not dependent from any of currently existing.
Date | English Name | Dutch Name | Turkish Name | Russian Name | Remarks |
|---|---|---|---|---|---|
| 1 January | New Year’s Day | Nieuwjaars dag | Yılbaşı | Новый Год | |
| 17 January | Economy Day | Dag van de economie | Ekonomi Günü | День экономики | In honor of the Ministry of Economy of Lostisland (anniversary of foundation) |
| 11 March | Acquisition Day | Dag van de verwerving | Edinimi Gün | День Обретения | Anniversary of the declaration of sovereignty over Hunter Island (acquisition of territory) |
| 22 April | President’s Birthday | Verjaardag van de President | Başkan Doğum Günü | День Рождения Президента | Birthday of Yaroslav Mar, the President of the Federal Republic |
| 6 May | Birthday of the Presidential Cat | Verjaardag van de President’s kat | Cumhurbaşkanlığı Kedi Günü | День Рождения президентского кота | Birthday of Sigismund Knushevitzky, cat of the President of the Federal Republic |
| 8 May | Victory Day | Dag van de overwinning | Zafer Bayramı | День Победы | Anniversary of victory of the Nazi Germany |
| 2 July | Day of Lostisland | Dag van Lostisland | Lostisland Günü | День Лостайленда | Anniversary of the foundation of Lostisland |
| 1—4 September | Days of Independence | Vrijheid’s dagen | Bağımsızlık Gün | Дни Независимости | Anniversaries of the step-by-step proclamation of the Lostislandic independence |
| 18 September | Prime Minister's Birthday | Verhaardag van de premier | Başbakan Doğum Günü | День Рождения Премьер-министра | Birthday of Irina Sopas, the Prime Minister of the Federal Republic |
| 29 October | Day of the MFA workers | Dag ter ere van de medewerkers van Buitenlandse zaken | Dışişleri personeli onuruna Günü | День работников МИД | In honor of the Ministry of Foreign Affairs of Lostisland (anniversary of foundation) |
| 5 December | Day of the media workers | Dag ter ere van de medewerkers van de media | Medya çalışanlarının Günü | День работников прессы | In honor of the Lostislandic media (anniversary of foundation of the Northern Herald, first newspaper of Lostisland) |
| 15 December | Police Day | Dag ter ere van de politie | Polis Günü | День полиции | In honor of the Ministry of Home Affairs of Lostisland (anniversary of foundation) |
| 22 December | Day of Defense | Dag ter ere van defensie | Savunma Günü | День обороны | In honor of the Ministry of Defense of Lostisland (anniversary of foundation) |