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Holidays optimizer
Define a period
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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.
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..in Belgium
| Secteur public
Today, Thursday, 1 May, 2025

Working day : no (Dag van de Arbeid)
Week : 18 / 52
Day of the year : 121 / 365
Working day of the year : 84 / 251
Time (UTC +01) : 00:51

Working days

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Brasil
India
China
South Korea
Japan
México
Colombia
Venezuela
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
From to
days:
working days:
weekend days:
custom dates:
public holidays:
Define a period
×
From:
Morning
Afternoon
to:
Morning
Afternoon
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▼
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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 ()
January 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
53
01
15
0
0
Nieuwjaarsdag
+
×
02
15
1
0
+
×
03
15
2
0
+
×
01
04
15
3
0
+
×
05
15
4
0
+
×
06
15
5
0
+
×
07
15
6
0
+
×
08
15
7
0
+
×
09
15
8
0
+
×
10
15
9
0
+
×
02
11
15
10
0
+
×
12
15
11
0
+
×
13
15
12
0
+
×
14
15
13
0
+
×
15
15
14
0
+
×
16
15
15
0
+
×
17
15
16
0
+
×
03
18
15
17
0
+
×
19
15
18
0
+
×
20
15
19
0
+
×
21
15
20
0
+
×
22
15
21
0
+
×
23
15
22
0
+
×
24
15
23
0
+
×
04
25
15
24
0
+
×
26
15
25
0
+
×
27
15
26
0
+
×
28
15
27
0
+
×
29
15
28
0
+
×
30
15
29
0
+
×
31
15
30
0
+
×
05
February 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
05
01
15
31
0
+
×
02
15
32
0
+
×
03
15
33
0
+
×
04
15
34
0
+
×
05
15
35
0
+
×
06
15
36
0
+
×
07
15
37
0
+
×
06
08
15
38
0
+
×
09
15
39
0
+
×
10
15
40
0
+
×
11
15
41
0
+
×
12
15
42
0
+
×
13
15
43
0
+
×
14
15
44
0
+
×
07
15
15
45
0
+
×
16
15
46
0
+
×
17
15
47
0
+
×
18
15
48
0
+
×
19
15
49
0
+
×
20
15
50
0
+
×
21
15
51
0
+
×
08
22
15
52
0
+
×
23
15
53
0
+
×
24
15
54
0
+
×
25
15
55
0
+
×
26
15
56
0
+
×
27
15
57
0
+
×
28
15
58
0
+
×
09
10
March 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
09
01
15
59
0
+
×
02
15
60
0
+
×
03
15
61
0
+
×
04
15
62
0
+
×
05
15
63
0
+
×
06
15
64
0
+
×
07
15
65
0
+
×
10
08
15
66
0
+
×
09
15
67
0
+
×
10
15
68
0
+
×
11
15
69
0
+
×
12
15
70
0
+
×
13
15
71
0
+
×
14
15
72
0
+
×
11
15
15
73
0
+
×
16
15
74
0
+
×
17
15
75
0
+
×
18
15
76
0
+
×
19
15
77
0
+
×
20
15
78
0
+
×
21
15
79
0
+
×
12
22
15
80
0
+
×
23
15
81
0
+
×
24
15
82
0
+
×
25
15
83
0
+
×
26
15
84
0
+
×
27
15
85
0
+
×
28
15
86
0
+
×
13
29
15
87
0
+
×
30
15
88
0
+
×
31
15
89
0
+
×
14
April 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
13
01
15
90
0
+
×
02
15
91
0
+
×
03
15
92
0
+
×
04
15
93
0
+
×
14
05
15
94
0
Paasmaandag
+
×
06
15
95
0
+
×
07
15
96
0
+
×
08
15
97
0
+
×
09
15
98
0
+
×
10
15
99
0
+
×
11
15
100
0
+
×
15
12
15
101
0
+
×
13
15
102
0
+
×
14
15
103
0
+
×
15
15
104
0
+
×
16
15
105
0
+
×
17
15
106
0
+
×
18
15
107
0
+
×
16
19
15
108
0
+
×
20
15
109
0
+
×
21
15
110
0
+
×
22
15
111
0
+
×
23
15
112
0
+
×
24
15
113
0
+
×
25
15
114
0
+
×
17
26
15
115
0
+
×
27
15
116
0
+
×
28
15
117
0
+
×
29
15
118
0
+
×
30
15
119
0
+
×
18
 
May 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
17
01
15
120
0
Dag van de Arbeid
+
×
02
15
121
0
+
×
18
03
15
122
0
+
×
04
15
123
0
+
×
05
15
124
0
+
×
06
15
125
0
+
×
07
15
126
0
+
×
08
15
127
0
+
×
09
15
128
0
+
×
19
10
15
129
0
+
×
11
15
130
0
+
×
12
15
131
0
+
×
13
15
132
0
Hemelvaartsdag
+
×
14
15
133
0
+
×
15
15
134
0
+
×
16
15
135
0
+
×
20
17
15
136
0
+
×
18
15
137
0
+
×
19
15
138
0
+
×
20
15
139
0
+
×
21
15
140
0
+
×
22
15
141
0
+
×
23
15
142
0
+
×
21
24
15
143
0
Pinkstermaandag
+
×
25
15
144
0
+
×
26
15
145
0
+
×
27
15
146
0
+
×
28
15
147
0
+
×
29
15
148
0
+
×
30
15
149
0
+
×
22
31
15
150
0
+
×
June 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
22
01
15
151
0
+
×
02
15
152
0
+
×
03
15
153
0
+
×
04
15
154
0
+
×
05
15
155
0
+
×
06
15
156
0
+
×
23
07
15
157
0
+
×
08
15
158
0
+
×
09
15
159
0
+
×
10
15
160
0
+
×
11
15
161
0
+
×
12
15
162
0
+
×
13
15
163
0
+
×
24
14
15
164
0
+
×
15
15
165
0
+
×
16
15
166
0
+
×
17
15
167
0
+
×
18
15
168
0
+
×
19
15
169
0
+
×
20
15
170
0
+
×
25
21
15
171
0
+
×
22
15
172
0
+
×
23
15
173
0
+
×
24
15
174
0
+
×
25
15
175
0
+
×
26
15
176
0
+
×
27
15
177
0
+
×
26
28
15
178
0
+
×
29
15
179
0
+
×
30
15
180
0
+
×
27
July 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
26
01
15
181
0
+
×
02
15
182
0
+
×
03
15
183
0
+
×
04
15
184
0
+
×
27
05
15
185
0
+
×
06
15
186
0
+
×
07
15
187
0
+
×
08
15
188
0
+
×
09
15
189
0
+
×
10
15
190
0
+
×
11
15
191
0
+
×
28
12
15
192
0
+
×
13
15
193
0
+
×
14
15
194
0
+
×
15
15
195
0
+
×
16
15
196
0
+
×
17
15
197
0
+
×
18
15
198
0
+
×
29
19
15
199
0
+
×
20
15
200
0
+
×
21
15
201
0
Nationale Feestdag
+
×
22
15
202
0
+
×
23
15
203
0
+
×
24
15
204
0
+
×
25
15
205
0
+
×
30
26
15
206
0
+
×
27
15
207
0
+
×
28
15
208
0
+
×
29
15
209
0
+
×
30
15
210
0
+
×
31
15
211
0
+
×
31
August 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
30
01
15
212
0
+
×
31
02
15
213
0
+
×
03
15
214
0
+
×
04
15
215
0
+
×
05
15
216
0
+
×
06
15
217
0
+
×
07
15
218
0
+
×
08
15
219
0
+
×
32
09
15
220
0
+
×
10
15
221
0
+
×
11
15
222
0
+
×
12
15
223
0
+
×
13
15
224
0
+
×
14
15
225
0
+
×
15
15
226
0
Onze-Lieve-Vrouw Hemelvaart
+
×
33
16
15
227
0
+
×
17
15
228
0
+
×
18
15
229
0
+
×
19
15
230
0
+
×
20
15
231
0
+
×
21
15
232
0
+
×
22
15
233
0
+
×
34
23
15
234
0
+
×
24
15
235
0
+
×
25
15
236
0
+
×
26
15
237
0
+
×
27
15
238
0
+
×
28
15
239
0
+
×
29
15
240
0
+
×
35
30
15
241
0
+
×
31
15
242
0
+
×
 
September 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
35
01
15
243
0
+
×
02
15
244
0
+
×
03
15
245
0
+
×
04
15
246
0
+
×
05
15
247
0
+
×
36
06
15
248
0
+
×
07
15
249
0
+
×
08
15
250
0
+
×
09
15
251
0
+
×
10
15
252
0
+
×
11
15
253
0
+
×
12
15
254
0
+
×
37
13
15
255
0
+
×
14
15
256
0
+
×
15
15
257
0
+
×
16
15
258
0
+
×
17
15
259
0
+
×
18
15
260
0
+
×
19
15
261
0
+
×
38
20
15
262
0
+
×
21
15
263
0
+
×
22
15
264
0
+
×
23
15
265
0
+
×
24
15
266
0
+
×
25
15
267
0
+
×
26
15
268
0
+
×
39
27
15
269
0
+
×
28
15
270
0
+
×
29
15
271
0
+
×
30
15
272
0
+
×
40
October 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
39
01
15
273
0
+
×
02
15
274
0
+
×
03
15
275
0
+
×
40
04
15
276
0
+
×
05
15
277
0
+
×
06
15
278
0
+
×
07
15
279
0
+
×
08
15
280
0
+
×
09
15
281
0
+
×
10
15
282
0
+
×
41
11
15
283
0
+
×
12
15
284
0
+
×
13
15
285
0
+
×
14
15
286
0
+
×
15
15
287
0
+
×
16
15
288
0
+
×
17
15
289
0
+
×
42
18
15
290
0
+
×
19
15
291
0
+
×
20
15
292
0
+
×
21
15
293
0
+
×
22
15
294
0
+
×
23
15
295
0
+
×
24
15
296
0
+
×
43
25
15
297
0
+
×
26
15
298
0
+
×
27
15
299
0
+
×
28
15
300
0
+
×
29
15
301
0
+
×
30
15
302
0
+
×
31
15
303
0
+
×
44
November 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
44
01
15
304
0
Allerheiligen
+
×
02
15
305
0
+
×
03
15
306
0
+
×
04
15
307
0
+
×
05
15
308
0
+
×
06
15
309
0
+
×
07
15
310
0
+
×
45
08
15
311
0
+
×
09
15
312
0
+
×
10
15
313
0
+
×
11
15
314
0
Wapenstilstand
+
×
12
15
315
0
+
×
13
15
316
0
+
×
14
15
317
0
+
×
46
15
15
318
0
Koningsdag
+
×
16
15
319
0
+
×
17
15
320
0
+
×
18
15
321
0
+
×
19
15
322
0
+
×
20
15
323
0
+
×
21
15
324
0
+
×
47
22
15
325
0
+
×
23
15
326
0
+
×
24
15
327
0
+
×
25
15
328
0
+
×
26
15
329
0
+
×
27
15
330
0
+
×
28
15
331
0
+
×
48
29
15
332
0
+
×
30
15
333
0
+
×
49
December 2010
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
48
01
15
334
0
+
×
02
15
335
0
+
×
03
15
336
0
+
×
04
15
337
0
+
×
05
15
338
0
+
×
49
06
15
339
0
+
×
07
15
340
0
+
×
08
15
341
0
+
×
09
15
342
0
+
×
10
15
343
0
+
×
11
15
344
0
+
×
12
15
345
0
+
×
50
13
15
346
0
+
×
14
15
347
0
+
×
15
15
348
0
+
×
16
15
349
0
+
×
17
15
350
0
+
×
18
15
351
0
+
×
19
15
352
0
+
×
51
20
15
353
0
+
×
21
15
354
0
+
×
22
15
355
0
+
×
23
15
356
0
+
×
24
15
357
0
+
×
25
15
358
0
Kerstmis
+
×
26
15
359
0
Tweede Kerstdag
+
×
52
27
15
360
0
+
×
28
15
361
0
+
×
29
15
362
0
+
×
30
15
363
0
+
×
31
15
364
0
+
×
01
 
January 2011
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
52
01
15
365
0
Nieuwjaarsdag
+
×
02
15
366
0
+
×
01
02
03
04
05
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