The National Day is a designated date on which celebrations mark the nationhood of a nation or non-sovereign country. This nationhood can be symbolized by the date of independence, of becoming a republic or a significant date for a patron saint or a ruler (birthday, accession, removal, etc.). Often the day is not called "National Day" but serves and can be considered as one. The National Day will often be a national holiday. text from Wikipedia, the free encyclopedia

1 January Cuba flagCuba Revolution Day
26 January Australia flagAustralia Australia Day
26 January India flagIndia Republic Day
4 February Sri Lanka flagSri Lanka Independence Day
11 February Iran flagIran Anniversary of the Islamic Revolution
15 February Serbia flagSerbia National Day
16 February Lithuania flagLithuania Independence Day
24 February Estonia flagEstonia Independence Day
3 March Bulgaria flagBulgaria Liberation Day
6 March Ghana flagGhana Independence Day
17 March Ireland flagIreland Saint Patrick's Day
25 March Greece flagGreece Independence Day
16 April Denmark flagDenmark Birthday of H.M. Queen Margrethe II
17 April Syria flagSyria Independence Day
27 April South Africa flagSouth Africa Freedom Day
27 April Netherlands flagNetherlands Koningsdag / King's Day
3 May Poland flagPoland Constitution Day
9 May European Union flagEuropean Union Europe Day
17 May Norway flagNorway Constitution Day
25 May Argentina flagArgentina Revolution Day
25 May Jordan flagJordan Independence Day
26 May Georgia flagGeorgia Independence Day
28 May Ethiopia flagEthiopia Derg Downfall Day
2 June Italy flagItaly Republic Day / Festa della Repubblica
6 June Sweden flagSweden Flag Day
10 June Portugal flagPortugal Portugal Day
12 June Philippines flagPhilippines Independence Day
12 June Russia flagRussia Russia Day
16 June United Kingdom flagUnited Kingdom Official Birthday of H.M. Queen Elizabeth II
17 June Iceland flagIceland Independence Day
23 June Luxemburg flagLuxemburg Grand Duke's Official Birthday
25 June Croatia flagCroatia Independence Day
25 June Slovenia flagSlovenia Statehood Day
1 July Burundi flagBurundi Independence Day
1 July Canada flagCanada Canada Day
3 July Belarus flagBelarus Independence Day
4 July United States of America flagUSA Independence Day
11 July Mongolia flagMongolia Independence Day / Revolution Day
14 July France flagFrance National Day
21 July Belgium flagBelgium Accession of King Leopold I
23 July Egypt flagEgypt Revolution Day
30 July Morocco flagMorocco Throne Day
1 August Switzerland flagSwitzerland Foundation of Confederation
6 August Jamaica flagJamaica Independence Day
7 August Cote d'Ivoire flagCote d'Ivoire Independence Day
15 August India flagIndia Independence Day
15 August Republic of Korea flagRepublic of Korea Liberation Day
17 August Gabon flagGabon Independence Day
17 August Indonesia flagIndonesia Independence Day
19 August Afghanistan flagAfghanistan Independence Day
20 August Hungary flagHungary Saint Stephen's Day
24 August Ukraine flagUkraine Independence Day
25 August Uruguay flagUruguay Independence Day
31 August Kyrgyzstan flagKyrgyzstan Independence Day
31 August Malaysia flagMalaysia Independence Day / Malaysia Day
1 September Slovakia flagSlovakia Constitution Day
7 September Brazil flagBrazil Independence Day
16 September Mexico flagMexico Independence Day
21 September Armenia flagArmenia Independence Day
21 September Malta flagMalta Independence Day
22 September Mali flagMali Independence Day
1 October China flagChina National Day of the People's Republic of China
1 October Cyprus flagCyprus Independence Day
1 October Nigeria flagNigeria Independence Day
2 October Guinea flagGuinea Independence Day
3 October Germany flagGermany Day of German Unity
8 October Croatia flagCroatia Independence Day
12 October Spain flagSpain National Day
24 October Zambia flagZambia Independence Day
26 October Austria flagAustria National Day
27 October Turkmenistan flagTurkmenistan Independence Day
1 November Algeria flagAlgeria Revolution Day
9 November Cambodia flagCambodia Independence Day
9 November Nepal flagNepal Constitution Day
11 November Poland flagPoland Independence Day
18 November Oman flagOman Birthday of Sultan Qaboos
18 November Latvia flagLatvia Independence Day
22 November Lebanon flagLebanon Independence Day
28 November Albania flagAlbania Independence Day
1 December Romania flagRomania Great Union Day / Unification Day
2 December United Arab Emirates flagUA Emirates Independence Day
5 December Thailand flagThailand Anniversary of Birthday H.M. King Phumiphon
6 December Finland flagFinland Independence Day
16 December Kazakhstan flagKazakhstan Independence Day
18 December Qatar flagQatar National Day
23 December Japan flagJapan Birthday of Emperor Akihito
24 December Libya flagLibya Independence Day