What's On Experience events, activities and museum highlights! What's On: 6.February 2023 Closed Mondays Closed Mondays From January through March 2023 the museum is closed on Mondays. Open Monday 20 February (winter holiday Oslo). 6. Feb – 31. Mar 2023 February - 2023 March Monday Tuesday Wednesday Thursday Friday Saturday Sunday 30. Closed Mondays 31. 01. 02. 03. 04. 05. 06. Closed Mondays 07. 08. 09. 10. 11. 12. 13. Closed Mondays 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. Closed Mondays 28. 01. 02. 03. 04. 05.