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Birthdays
Holidays optimizer
Define a period
AI Assistant
Assistant: Hello! I handle your requests in natural language, such as:

“Analyze the period from November 1, 2025, to April 25, 2028.”
or
“Add 100 business days to February 25, 2026.”
or
“Next Thursday at 2:12 PM + 124 working hours”
or
“I won't be working first week of next may (going to Greece)”
Assistant: I understand all languages.
Send
..in Belgium
| Jours fériés nationaux
Today, Saturday, 19 April, 2025

Working day : no (weekend day)
Week : 16 / 52
Day of the year : 109 / 365
Working day of the year : 77 / 252
Time (UTC +01) : 07:27

Working days

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México
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Argentina
Chile
Australia
South Africa
New Zealand
Monaco
Greece
Luxembourg
Working days world map
USA
France
Deutschland
Poland
Österreich
Schweiz
Italia
Netherlands
United Kingdom & Ireland
Russia
Ukraine
Israel
Sweden
Denmark
Norway
Finland
Turkey
España
Portugal
...
xxxx
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days:
working days:
weekend days:
custom dates:
public holidays:
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to:
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The Holidays        ptimizer
It tells you when to take your days off to maximize the length of your vacation
I would like to take
days off
from  
 to 
Before running the optimizer, clicking on the days of the calendar you can define:
the days you must necessarily be at work ()
the days you want to be on holidays for sure ()
April 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
14
15
16
19
15
0
0
+
×
20
15
1
0
+
×
17
21
15
2
0
Paasmaandag
+
×
22
15
3
0
+
×
23
15
4
0
+
×
24
15
5
0
+
×
25
15
6
0
+
×
26
15
7
0
+
×
27
15
8
0
+
×
18
28
15
9
0
+
×
29
15
10
0
+
×
30
15
11
0
+
×
19
May 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
18
01
15
12
0
Dag van de Arbeid
+
×
02
15
13
0
+
×
03
15
14
0
+
×
04
15
15
0
+
×
19
05
15
16
0
+
×
06
15
17
0
+
×
07
15
18
0
+
×
08
15
19
0
+
×
09
15
20
0
+
×
10
15
21
0
+
×
11
15
22
0
+
×
20
12
15
23
0
+
×
13
15
24
0
+
×
14
15
25
0
+
×
15
15
26
0
+
×
16
15
27
0
+
×
17
15
28
0
+
×
18
15
29
0
+
×
21
19
15
30
0
+
×
20
15
31
0
+
×
21
15
32
0
+
×
22
15
33
0
+
×
23
15
34
0
+
×
24
15
35
0
+
×
25
15
36
0
+
×
22
26
15
37
0
+
×
27
15
38
0
+
×
28
15
39
0
+
×
29
15
40
0
Hemelvaartsdag
+
×
30
15
41
0
+
×
31
15
42
0
+
×
23
June 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
22
01
15
43
0
+
×
23
02
15
44
0
+
×
03
15
45
0
+
×
04
15
46
0
+
×
05
15
47
0
+
×
06
15
48
0
+
×
07
15
49
0
+
×
08
15
50
0
+
×
24
09
15
51
0
Pinkstermaandag
+
×
10
15
52
0
+
×
11
15
53
0
+
×
12
15
54
0
+
×
13
15
55
0
+
×
14
15
56
0
+
×
15
15
57
0
+
×
25
16
15
58
0
+
×
17
15
59
0
+
×
18
15
60
0
+
×
19
15
61
0
+
×
20
15
62
0
+
×
21
15
63
0
+
×
22
15
64
0
+
×
26
23
15
65
0
+
×
24
15
66
0
+
×
25
15
67
0
+
×
26
15
68
0
+
×
27
15
69
0
+
×
28
15
70
0
+
×
29
15
71
0
+
×
27
30
15
72
0
+
×
July 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
27
01
15
73
0
+
×
02
15
74
0
+
×
03
15
75
0
+
×
04
15
76
0
+
×
05
15
77
0
+
×
06
15
78
0
+
×
28
07
15
79
0
+
×
08
15
80
0
+
×
09
15
81
0
+
×
10
15
82
0
+
×
11
15
83
0
+
×
12
15
84
0
+
×
13
15
85
0
+
×
29
14
15
86
0
+
×
15
15
87
0
+
×
16
15
88
0
+
×
17
15
89
0
+
×
18
15
90
0
+
×
19
15
91
0
+
×
20
15
92
0
+
×
30
21
15
93
0
Nationale Feestdag
+
×
22
15
94
0
+
×
23
15
95
0
+
×
24
15
96
0
+
×
25
15
97
0
+
×
26
15
98
0
+
×
27
15
99
0
+
×
31
28
15
100
0
+
×
29
15
101
0
+
×
30
15
102
0
+
×
31
15
103
0
+
×
32
 
August 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
31
01
15
104
0
+
×
02
15
105
0
+
×
03
15
106
0
+
×
32
04
15
107
0
+
×
05
15
108
0
+
×
06
15
109
0
+
×
07
15
110
0
+
×
08
15
111
0
+
×
09
15
112
0
+
×
10
15
113
0
+
×
33
11
15
114
0
+
×
12
15
115
0
+
×
13
15
116
0
+
×
14
15
117
0
+
×
15
15
118
0
Onze-Lieve-Vrouw Hemelvaart
+
×
16
15
119
0
+
×
17
15
120
0
+
×
34
18
15
121
0
+
×
19
15
122
0
+
×
20
15
123
0
+
×
21
15
124
0
+
×
22
15
125
0
+
×
23
15
126
0
+
×
24
15
127
0
+
×
35
25
15
128
0
+
×
26
15
129
0
+
×
27
15
130
0
+
×
28
15
131
0
+
×
29
15
132
0
+
×
30
15
133
0
+
×
31
15
134
0
+
×
36
September 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
36
01
15
135
0
+
×
02
15
136
0
+
×
03
15
137
0
+
×
04
15
138
0
+
×
05
15
139
0
+
×
06
15
140
0
+
×
07
15
141
0
+
×
37
08
15
142
0
+
×
09
15
143
0
+
×
10
15
144
0
+
×
11
15
145
0
+
×
12
15
146
0
+
×
13
15
147
0
+
×
14
15
148
0
+
×
38
15
15
149
0
+
×
16
15
150
0
+
×
17
15
151
0
+
×
18
15
152
0
+
×
19
15
153
0
+
×
20
15
154
0
+
×
21
15
155
0
+
×
39
22
15
156
0
+
×
23
15
157
0
+
×
24
15
158
0
+
×
25
15
159
0
+
×
26
15
160
0
+
×
27
15
161
0
+
×
28
15
162
0
+
×
40
29
15
163
0
+
×
30
15
164
0
+
×
41
October 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
40
01
15
165
0
+
×
02
15
166
0
+
×
03
15
167
0
+
×
04
15
168
0
+
×
05
15
169
0
+
×
41
06
15
170
0
+
×
07
15
171
0
+
×
08
15
172
0
+
×
09
15
173
0
+
×
10
15
174
0
+
×
11
15
175
0
+
×
12
15
176
0
+
×
42
13
15
177
0
+
×
14
15
178
0
+
×
15
15
179
0
+
×
16
15
180
0
+
×
17
15
181
0
+
×
18
15
182
0
+
×
19
15
183
0
+
×
43
20
15
184
0
+
×
21
15
185
0
+
×
22
15
186
0
+
×
23
15
187
0
+
×
24
15
188
0
+
×
25
15
189
0
+
×
26
15
190
0
+
×
44
27
15
191
0
+
×
28
15
192
0
+
×
29
15
193
0
+
×
30
15
194
0
+
×
31
15
195
0
+
×
45
November 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
44
01
15
196
0
Allerheiligen
+
×
02
15
197
0
+
×
45
03
15
198
0
+
×
04
15
199
0
+
×
05
15
200
0
+
×
06
15
201
0
+
×
07
15
202
0
+
×
08
15
203
0
+
×
09
15
204
0
+
×
46
10
15
205
0
+
×
11
15
206
0
Wapenstilstand
+
×
12
15
207
0
+
×
13
15
208
0
+
×
14
15
209
0
+
×
15
15
210
0
+
×
16
15
211
0
+
×
47
17
15
212
0
+
×
18
15
213
0
+
×
19
15
214
0
+
×
20
15
215
0
+
×
21
15
216
0
+
×
22
15
217
0
+
×
23
15
218
0
+
×
48
24
15
219
0
+
×
25
15
220
0
+
×
26
15
221
0
+
×
27
15
222
0
+
×
28
15
223
0
+
×
29
15
224
0
+
×
30
15
225
0
+
×
49
 
December 2025
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
49
01
15
226
0
+
×
02
15
227
0
+
×
03
15
228
0
+
×
04
15
229
0
+
×
05
15
230
0
+
×
06
15
231
0
+
×
07
15
232
0
+
×
50
08
15
233
0
+
×
09
15
234
0
+
×
10
15
235
0
+
×
11
15
236
0
+
×
12
15
237
0
+
×
13
15
238
0
+
×
14
15
239
0
+
×
51
15
15
240
0
+
×
16
15
241
0
+
×
17
15
242
0
+
×
18
15
243
0
+
×
19
15
244
0
+
×
20
15
245
0
+
×
21
15
246
0
+
×
52
22
15
247
0
+
×
23
15
248
0
+
×
24
15
249
0
+
×
25
15
250
0
Kerstmis
+
×
26
15
251
0
+
×
27
15
252
0
+
×
28
15
253
0
+
×
01
29
15
254
0
+
×
30
15
255
0
+
×
31
15
256
0
+
×
02
January 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
01
01
15
257
0
Nieuwjaarsdag
+
×
02
03
04
05
06
Public holidays
Weekend days
Days to take
Vacations
Days to take:
You can now adjust the optimization by clicking on the calendar
Holidays length:
Optimization factor:
?
Copy
×
From to
:
I have to be at work
I know I want to be on vacation
?
I let the optimizer decide