Denmark - National Holidays

There are 12 "official" holidays in Denmark. So if you are planning a reconnaissance trip make sure to avoid these dates, unless you wish for a holiday too.
In Denmark many shops, banks, restaurants, museums are closed on Constitution Day (5th of June), Christmas Eve, Christmas Day, and New Year's Day.

1st January  - New Year's Day (Nytårsdag)         
Palm Sunday, Sunday before Easter (Palmesøndag)
Maundy Thursday or Holy Thursday. The Tursday before Easter (Skærtorsdag)
Good Friday, The Friday before Easter (Langfredag) 
Easter Sunday (Påskedag)
Easter Monday (2. Påskedag)
Great Prayer Day, 4th Friday after Easter (Store Bededag)
Ascension Day, 40 days after Easter (Kristi Himmelfart) 
1st May - Labor day. Not an official holiday but many try to take the day off from noon.
Whit Sunday (7 weeks after Easter) Pinsedag
Whit Monday (7 weeks+1 day after Easter) 
5 June - Constitution Day is generally viewed as the National Day
24th December - Christmas Eve's Day (Juleaftens dag) Danes celebrate Christmas Eve, and some take the day off from noon.
25 th December - Christmas Day (Juledag)
26th December - 2nd Day of Christmas (2. Juledag)  Boxing Day    

Holiday Dates 2007

1 January - New Years Day
1 April -  Palm Sunday
5 April - Maundy/Holy Thursday
6 April - Good Friday 
8 April - Easter Sunday
9 April - Easter Monday
4 May - Great Prayer Day
17 May - Ascension Day
27 May - Whit Sunday
28 May - Whit Monday
24 December - Christmas Eve's Day
25 December - Christmas Day
26 December- 2nd Day of Christmas (Boxing day)

Holiday dates 2008

1 January - New Years Day
16 March - Palm Sunday
20 March - Maundy/Holy Thursday
21 March - Good Friday 
23 March - Easter Sunday
24 March - Easter Monday
18 April - Great Prayer Day
1 May - Ascension Day
11 May - Whit Sunday
12 May - Whit Monday
24 December - Christmas Eve's Day
25 December - Christmas Day
26 December - 2nd Day of Christmas (Boxing day)

Holiday dates 2009

1 January - New Years Day
9 April - Maundy/Holy Thursday
10 April - Good Friday 
12 April- Easter Sunday
13 April - Easter Monday
8 May - Great or Common Prayer Day
21 May - Ascension Day
31 May - Whit Sunday
1 June - Whit Monday
24 December - Christmas Eve's Day
25 December - Christmas Day
26 December - 2nd Day of Christmas (Boxing day)