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Birthdays
Holidays optimizer
New version 2026
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
Make
every
day
count
..in Poland
| National public holidays

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Today, Wednesday, 7 January, 2026

Working day :
Week : / 52
Day of the year : /
Working day of the year : /
Time (Europe/Warsaw) : 22:49

Working days

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South Korea
Canada
Italia
España
South Africa
New Zealand
Israel
Sweden
Denmark
Norway
Finland
Turkey
Portugal
Brasil
Greece
Luxembourg
Australia
Working days world map
Deutschland
Slovenia
Slovakia
Estonia
Croatia
Serbia
Romania
Bulgaria
Czech Republic
Russia
Ukraine
Turkey
France
Belarus
USA
Schweiz
Netherlands
Belgique
China
...
xxxx
From to
days:
working days:
weekend days:
custom dates:
public holidays:
Define a period
×
From:
to:
Morning
Afternoon
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▼
make it periodic
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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 
How many vacation blocks?   (    or )        
Each vacation should be at least days
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 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
01
02
07
15
0
0
+
×
08
15
1
0
+
×
09
15
2
0
+
×
10
15
3
0
+
×
11
15
4
0
+
×
03
12
15
5
0
+
×
13
15
6
0
+
×
14
15
7
0
+
×
15
15
8
0
+
×
16
15
9
0
+
×
17
15
10
0
+
×
18
15
11
0
+
×
04
19
15
12
0
+
×
20
15
13
0
+
×
21
15
14
0
+
×
22
15
15
0
+
×
23
15
16
0
+
×
24
15
17
0
+
×
25
15
18
0
+
×
05
26
15
19
0
+
×
27
15
20
0
+
×
28
15
21
0
+
×
29
15
22
0
+
×
30
15
23
0
+
×
31
15
24
0
+
×
06
February 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
05
01
15
25
0
+
×
06
02
15
26
0
+
×
03
15
27
0
+
×
04
15
28
0
+
×
05
15
29
0
+
×
06
15
30
0
+
×
07
15
31
0
+
×
08
15
32
0
+
×
07
09
15
33
0
+
×
10
15
34
0
+
×
11
15
35
0
+
×
12
15
36
0
+
×
13
15
37
0
+
×
14
15
38
0
+
×
15
15
39
0
+
×
08
16
15
40
0
+
×
17
15
41
0
+
×
18
15
42
0
+
×
19
15
43
0
+
×
20
15
44
0
+
×
21
15
45
0
+
×
22
15
46
0
+
×
09
23
15
47
0
+
×
24
15
48
0
+
×
25
15
49
0
+
×
26
15
50
0
+
×
27
15
51
0
+
×
28
15
52
0
+
×
10
March 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
09
01
15
53
0
+
×
10
02
15
54
0
+
×
03
15
55
0
+
×
04
15
56
0
+
×
05
15
57
0
+
×
06
15
58
0
+
×
07
15
59
0
+
×
08
15
60
0
+
×
11
09
15
61
0
+
×
10
15
62
0
+
×
11
15
63
0
+
×
12
15
64
0
+
×
13
15
65
0
+
×
14
15
66
0
+
×
15
15
67
0
+
×
12
16
15
68
0
+
×
17
15
69
0
+
×
18
15
70
0
+
×
19
15
71
0
+
×
20
15
72
0
+
×
21
15
73
0
+
×
22
15
74
0
+
×
13
23
15
75
0
+
×
24
15
76
0
+
×
25
15
77
0
+
×
26
15
78
0
+
×
27
15
79
0
+
×
28
15
80
0
+
×
29
15
81
0
+
×
14
30
15
82
0
+
×
31
15
83
0
+
×
April 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
14
01
15
84
0
+
×
02
15
85
0
+
×
03
15
86
0
+
×
04
15
87
0
+
×
05
15
88
0
Niedziela Wielkanocna
+
×
15
06
15
89
0
Poniedziałek Wielkanocny
+
×
07
15
90
0
+
×
08
15
91
0
+
×
09
15
92
0
+
×
10
15
93
0
+
×
11
15
94
0
+
×
12
15
95
0
+
×
16
13
15
96
0
+
×
14
15
97
0
+
×
15
15
98
0
+
×
16
15
99
0
+
×
17
15
100
0
+
×
18
15
101
0
+
×
19
15
102
0
+
×
17
20
15
103
0
+
×
21
15
104
0
+
×
22
15
105
0
+
×
23
15
106
0
+
×
24
15
107
0
+
×
25
15
108
0
+
×
26
15
109
0
+
×
18
27
15
110
0
+
×
28
15
111
0
+
×
29
15
112
0
+
×
30
15
113
0
+
×
19
 
May 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
18
01
15
114
0
Święto Pracy
+
×
02
15
115
0
+
×
03
15
116
0
Święto Konstytucji
+
×
19
04
15
117
0
+
×
05
15
118
0
+
×
06
15
119
0
+
×
07
15
120
0
+
×
08
15
121
0
+
×
09
15
122
0
+
×
10
15
123
0
+
×
20
11
15
124
0
+
×
12
15
125
0
+
×
13
15
126
0
+
×
14
15
127
0
+
×
15
15
128
0
+
×
16
15
129
0
+
×
17
15
130
0
+
×
21
18
15
131
0
+
×
19
15
132
0
+
×
20
15
133
0
+
×
21
15
134
0
+
×
22
15
135
0
+
×
23
15
136
0
+
×
24
15
137
0
Zielone Świątki
+
×
22
25
15
138
0
+
×
26
15
139
0
+
×
27
15
140
0
+
×
28
15
141
0
+
×
29
15
142
0
+
×
30
15
143
0
+
×
31
15
144
0
+
×
23
June 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
23
01
15
145
0
+
×
02
15
146
0
+
×
03
15
147
0
+
×
04
15
148
0
Boże Ciało
+
×
05
15
149
0
+
×
06
15
150
0
+
×
07
15
151
0
+
×
24
08
15
152
0
+
×
09
15
153
0
+
×
10
15
154
0
+
×
11
15
155
0
+
×
12
15
156
0
+
×
13
15
157
0
+
×
14
15
158
0
+
×
25
15
15
159
0
+
×
16
15
160
0
+
×
17
15
161
0
+
×
18
15
162
0
+
×
19
15
163
0
+
×
20
15
164
0
+
×
21
15
165
0
+
×
26
22
15
166
0
+
×
23
15
167
0
+
×
24
15
168
0
+
×
25
15
169
0
+
×
26
15
170
0
+
×
27
15
171
0
+
×
28
15
172
0
+
×
27
29
15
173
0
+
×
30
15
174
0
+
×
28
July 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
27
01
15
175
0
+
×
02
15
176
0
+
×
03
15
177
0
+
×
04
15
178
0
+
×
05
15
179
0
+
×
28
06
15
180
0
+
×
07
15
181
0
+
×
08
15
182
0
+
×
09
15
183
0
+
×
10
15
184
0
+
×
11
15
185
0
+
×
12
15
186
0
+
×
29
13
15
187
0
+
×
14
15
188
0
+
×
15
15
189
0
+
×
16
15
190
0
+
×
17
15
191
0
+
×
18
15
192
0
+
×
19
15
193
0
+
×
30
20
15
194
0
+
×
21
15
195
0
+
×
22
15
196
0
+
×
23
15
197
0
+
×
24
15
198
0
+
×
25
15
199
0
+
×
26
15
200
0
+
×
31
27
15
201
0
+
×
28
15
202
0
+
×
29
15
203
0
+
×
30
15
204
0
+
×
31
15
205
0
+
×
32
August 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
31
01
15
206
0
+
×
02
15
207
0
+
×
32
03
15
208
0
+
×
04
15
209
0
+
×
05
15
210
0
+
×
06
15
211
0
+
×
07
15
212
0
+
×
08
15
213
0
+
×
09
15
214
0
+
×
33
10
15
215
0
+
×
11
15
216
0
+
×
12
15
217
0
+
×
13
15
218
0
+
×
14
15
219
0
+
×
15
15
220
0
Wniebowzięcie
+
×
16
15
221
0
+
×
34
17
15
222
0
+
×
18
15
223
0
+
×
19
15
224
0
+
×
20
15
225
0
+
×
21
15
226
0
+
×
22
15
227
0
+
×
23
15
228
0
+
×
35
24
15
229
0
+
×
25
15
230
0
+
×
26
15
231
0
+
×
27
15
232
0
+
×
28
15
233
0
+
×
29
15
234
0
+
×
30
15
235
0
+
×
36
31
15
236
0
+
×
 
September 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
36
01
15
237
0
+
×
02
15
238
0
+
×
03
15
239
0
+
×
04
15
240
0
+
×
05
15
241
0
+
×
06
15
242
0
+
×
37
07
15
243
0
+
×
08
15
244
0
+
×
09
15
245
0
+
×
10
15
246
0
+
×
11
15
247
0
+
×
12
15
248
0
+
×
13
15
249
0
+
×
38
14
15
250
0
+
×
15
15
251
0
+
×
16
15
252
0
+
×
17
15
253
0
+
×
18
15
254
0
+
×
19
15
255
0
+
×
20
15
256
0
+
×
39
21
15
257
0
+
×
22
15
258
0
+
×
23
15
259
0
+
×
24
15
260
0
+
×
25
15
261
0
+
×
26
15
262
0
+
×
27
15
263
0
+
×
40
28
15
264
0
+
×
29
15
265
0
+
×
30
15
266
0
+
×
41
October 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
40
01
15
267
0
+
×
02
15
268
0
+
×
03
15
269
0
+
×
04
15
270
0
+
×
41
05
15
271
0
+
×
06
15
272
0
+
×
07
15
273
0
+
×
08
15
274
0
+
×
09
15
275
0
+
×
10
15
276
0
+
×
11
15
277
0
+
×
42
12
15
278
0
+
×
13
15
279
0
+
×
14
15
280
0
+
×
15
15
281
0
+
×
16
15
282
0
+
×
17
15
283
0
+
×
18
15
284
0
+
×
43
19
15
285
0
+
×
20
15
286
0
+
×
21
15
287
0
+
×
22
15
288
0
+
×
23
15
289
0
+
×
24
15
290
0
+
×
25
15
291
0
+
×
44
26
15
292
0
+
×
27
15
293
0
+
×
28
15
294
0
+
×
29
15
295
0
+
×
30
15
296
0
+
×
31
15
297
0
+
×
45
November 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
44
01
15
298
0
Wszystkich Świętych
+
×
45
02
15
299
0
+
×
03
15
300
0
+
×
04
15
301
0
+
×
05
15
302
0
+
×
06
15
303
0
+
×
07
15
304
0
+
×
08
15
305
0
+
×
46
09
15
306
0
+
×
10
15
307
0
+
×
11
15
308
0
Dzień Niepodległości
+
×
12
15
309
0
+
×
13
15
310
0
+
×
14
15
311
0
+
×
15
15
312
0
+
×
47
16
15
313
0
+
×
17
15
314
0
+
×
18
15
315
0
+
×
19
15
316
0
+
×
20
15
317
0
+
×
21
15
318
0
+
×
22
15
319
0
+
×
48
23
15
320
0
+
×
24
15
321
0
+
×
25
15
322
0
+
×
26
15
323
0
+
×
27
15
324
0
+
×
28
15
325
0
+
×
29
15
326
0
+
×
49
30
15
327
0
+
×
December 2026
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
49
01
15
328
0
+
×
02
15
329
0
+
×
03
15
330
0
+
×
04
15
331
0
+
×
05
15
332
0
+
×
06
15
333
0
+
×
50
07
15
334
0
+
×
08
15
335
0
+
×
09
15
336
0
+
×
10
15
337
0
+
×
11
15
338
0
+
×
12
15
339
0
+
×
13
15
340
0
+
×
51
14
15
341
0
+
×
15
15
342
0
+
×
16
15
343
0
+
×
17
15
344
0
+
×
18
15
345
0
+
×
19
15
346
0
+
×
20
15
347
0
+
×
52
21
15
348
0
+
×
22
15
349
0
+
×
23
15
350
0
+
×
24
15
351
0
Wigilia Bożego Narodzenia
+
×
25
15
352
0
Boże Narodzenie
+
×
26
15
353
0
Drugi dzień Bożego Narodzenia
+
×
27
15
354
0
+
×
53
28
15
355
0
+
×
29
15
356
0
+
×
30
15
357
0
+
×
31
15
358
0
+
×
01
 
January 2027
week
Mon
Tue
Wed
Thu
Fri
Sat
Sun
53
01
15
359
0
Nowy Rok
+
×
02
15
360
0
+
×
03
15
361
0
+
×
01
02
03
04
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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:
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I have to be at work
I know I want to be on vacation
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