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:
I have to be at work
I know I want to be on vacation
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Country :
Calendar
School holidays :
The Holidays      ptimizer
It tells you when to take your days off to maximize the length of your vacation
Calendar
Language
 ▶
Optimize it
I would like to take
days off
from  
1 2 3 4 5 6 7 9 10 11 12
 to 
1 2 3 4 5 6 7 9 10 11 12
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 ()
September 2019
week
mon
tue
wed
thu
fri
sat
sun
35
36
37
11
15
0
0
+
×
12
15
1
0
+
×
13
15
2
0
+
×
14
15
3
0
+
×
15
15
4
0
+
×
38
16
15
5
0
+
×
17
15
6
0
+
×
18
15
7
0
+
×
19
15
8
0
+
×
20
15
9
0
+
×
21
15
10
0
+
×
22
15
11
0
+
×
39
23
15
12
0
+
×
24
15
13
0
+
×
25
15
14
0
+
×
26
15
15
0
+
×
27
15
16
0
+
×
28
15
17
0
+
×
29
15
18
0
+
×
40
30
15
19
0
+
×
October 2019
week
mon
tue
wed
thu
fri
sat
sun
40
01
15
20
0
+
×
02
15
21
0
+
×
03
15
22
0
+
×
04
15
23
0
+
×
05
15
24
0
+
×
06
15
25
0
+
×
41
07
15
26
0
+
×
08
15
27
0
+
×
09
15
28
0
+
×
10
15
29
0
+
×
11
15
30
0
+
×
12
15
31
0
+
×
13
15
32
0
+
×
42
14
15
33
0
+
×
15
15
34
0
+
×
16
15
35
0
+
×
17
15
36
0
+
×
18
15
37
0
+
×
19
15
38
0
+
×
20
15
39
0
+
×
43
21
15
40
0
+
×
22
15
41
0
+
×
23
15
42
0
+
×
24
15
43
0
+
×
25
15
44
0
+
×
26
15
45
0
+
×
27
15
46
0
+
×
44
28
15
47
0
+
×
29
15
48
0
+
×
30
15
49
0
+
×
31
15
50
0
+
×
45
November 2019
week
mon
tue
wed
thu
fri
sat
sun
44
01
15
51
0
+
×
02
15
52
0
+
×
03
15
53
0
+
×
45
04
15
54
0
+
×
05
15
55
0
+
×
06
15
56
0
+
×
07
15
57
0
+
×
08
15
58
0
+
×
09
15
59
0
+
×
10
15
60
0
+
×
46
11
15
61
0
+
×
12
15
62
0
+
×
13
15
63
0
+
×
14
15
64
0
+
×
15
15
65
0
+
×
16
15
66
0
+
×
17
15
67
0
+
×
47
18
15
68
0
+
×
19
15
69
0
+
×
20
15
70
0
+
×
21
15
71
0
+
×
22
15
72
0
+
×
23
15
73
0
+
×
24
15
74
0
+
×
48
25
15
75
0
+
×
26
15
76
0
+
×
27
15
77
0
+
×
28
15
78
0
+
×
29
15
79
0
+
×
30
15
80
0
+
×
49
December 2019
week
mon
tue
wed
thu
fri
sat
sun
48
01
15
81
0
+
×
49
02
15
82
0
+
×
03
15
83
0
+
×
04
15
84
0
+
×
05
15
85
0
+
×
06
15
86
0
+
×
07
15
87
0
+
×
08
15
88
0
+
×
50
09
15
89
0
+
×
10
15
90
0
+
×
11
15
91
0
+
×
12
15
92
0
+
×
13
15
93
0
+
×
14
15
94
0
+
×
15
15
95
0
+
×
51
16
15
96
0
+
×
17
15
97
0
+
×
18
15
98
0
+
×
19
15
99
0
+
×
20
15
100
0
+
×
21
15
101
0
+
×
22
15
102
0
+
×
52
23
15
103
0
+
×
24
15
104
0
+
×
25
15
105
0
Eerste Kerstdag
+
×
26
15
106
0
Tweede Kerstdag
+
×
27
15
107
0
+
×
28
15
108
0
+
×
29
15
109
0
+
×
01
30
15
110
0
+
×
31
15
111
0
+
×
 
January 2020
week
mon
tue
wed
thu
fri
sat
sun
01
01
15
112
0
Nieuwjaarsdag
+
×
02
15
113
0
+
×
03
15
114
0
+
×
04
15
115
0
+
×
05
15
116
0
+
×
02
06
15
117
0
+
×
07
15
118
0
+
×
08
15
119
0
+
×
09
15
120
0
+
×
10
15
121
0
+
×
11
15
122
0
+
×
12
15
123
0
+
×
03
13
15
124
0
+
×
14
15
125
0
+
×
15
15
126
0
+
×
16
15
127
0
+
×
17
15
128
0
+
×
18
15
129
0
+
×
19
15
130
0
+
×
04
20
15
131
0
+
×
21
15
132
0
+
×
22
15
133
0
+
×
23
15
134
0
+
×
24
15
135
0
+
×
25
15
136
0
+
×
26
15
137
0
+
×
05
27
15
138
0
+
×
28
15
139
0
+
×
29
15
140
0
+
×
30
15
141
0
+
×
31
15
142
0
+
×
06
February 2020
week
mon
tue
wed
thu
fri
sat
sun
05
01
15
143
0
+
×
02
15
144
0
+
×
06
03
15
145
0
+
×
04
15
146
0
+
×
05
15
147
0
+
×
06
15
148
0
+
×
07
15
149
0
+
×
08
15
150
0
+
×
09
15
151
0
+
×
07
10
15
152
0
+
×
11
15
153
0
+
×
12
15
154
0
+
×
13
15
155
0
+
×
14
15
156
0
+
×
15
15
157
0
+
×
16
15
158
0
+
×
08
17
15
159
0
+
×
18
15
160
0
+
×
19
15
161
0
+
×
20
15
162
0
+
×
21
15
163
0
+
×
22
15
164
0
+
×
23
15
165
0
+
×
09
24
15
166
0
+
×
25
15
167
0
+
×
26
15
168
0
+
×
27
15
169
0
+
×
28
15
170
0
+
×
29
15
171
0
+
×
10
March 2020
week
mon
tue
wed
thu
fri
sat
sun
09
01
15
172
0
+
×
10
02
15
173
0
+
×
03
15
174
0
+
×
04
15
175
0
+
×
05
15
176
0
+
×
06
15
177
0
+
×
07
15
178
0
+
×
08
15
179
0
+
×
11
09
15
180
0
+
×
10
15
181
0
+
×
11
15
182
0
+
×
12
15
183
0
+
×
13
15
184
0
+
×
14
15
185
0
+
×
15
15
186
0
+
×
12
16
15
187
0
+
×
17
15
188
0
+
×
18
15
189
0
+
×
19
15
190
0
+
×
20
15
191
0
+
×
21
15
192
0
+
×
22
15
193
0
+
×
13
23
15
194
0
+
×
24
15
195
0
+
×
25
15
196
0
+
×
26
15
197
0
+
×
27
15
198
0
+
×
28
15
199
0
+
×
29
15
200
0
+
×
14
30
15
201
0
+
×
31
15
202
0
+
×
April 2020
week
mon
tue
wed
thu
fri
sat
sun
14
01
15
203
0
+
×
02
15
204
0
+
×
03
15
205
0
+
×
04
15
206
0
+
×
05
15
207
0
+
×
15
06
15
208
0
+
×
07
15
209
0
+
×
08
15
210
0
+
×
09
15
211
0
+
×
10
15
212
0
Goede Vrijdag
+
×
11
15
213
0
+
×
12
15
214
0
Eerste Paasdag
+
×
16
13
15
215
0
Tweede Paasdag
+
×
14
15
216
0
+
×
15
15
217
0
+
×
16
15
218
0
+
×
17
15
219
0
+
×
18
15
220
0
+
×
19
15
221
0
+
×
17
20
15
222
0
+
×
21
15
223
0
+
×
22
15
224
0
+
×
23
15
225
0
+
×
24
15
226
0
+
×
25
15
227
0
+
×
26
15
228
0
+
×
18
27
15
229
0
Koningsdag
+
×
28
15
230
0
+
×
29
15
231
0
+
×
30
15
232
0
+
×
19
May 2020
week
mon
tue
wed
thu
fri
sat
sun
18
01
15
233
0
+
×
02
15
234
0
+
×
03
15
235
0
+
×
19
04
15
236
0
+
×
05
15
237
0
Bevrijdingsdag
+
×
06
15
238
0
+
×
07
15
239
0
+
×
08
15
240
0
+
×
09
15
241
0
+
×
10
15
242
0
+
×
20
11
15
243
0
+
×
12
15
244
0
+
×
13
15
245
0
+
×
14
15
246
0
+
×
15
15
247
0
+
×
16
15
248
0
+
×
17
15
249
0
+
×
21
18
15
250
0
+
×
19
15
251
0
+
×
20
15
252
0
+
×
21
15
253
0
Hemelvaartsdag
+
×
22
15
254
0
+
×
23
15
255
0
+
×
24
15
256
0
+
×
22
25
15
257
0
+
×
26
15
258
0
+
×
27
15
259
0
+
×
28
15
260
0
+
×
29
15
261
0
+
×
30
15
262
0
+
×
31
15
263
0
Eerste Pinksterdag
+
×
23
June 2020
week
mon
tue
wed
thu
fri
sat
sun
23
01
15
264
0
Tweede Pinksterdag
+
×
02
15
265
0
+
×
03
15
266
0
+
×
04
15
267
0
+
×
05
15
268
0
+
×
06
15
269
0
+
×
07
15
270
0
+
×
24
08
15
271
0
+
×
09
15
272
0
+
×
10
15
273
0
+
×
11
15
274
0
+
×
12
15
275
0
+
×
13
15
276
0
+
×
14
15
277
0
+
×
25
15
15
278
0
+
×
16
15
279
0
+
×
17
15
280
0
+
×
18
15
281
0
+
×
19
15
282
0
+
×
20
15
283
0
+
×
21
15
284
0
+
×
26
22
15
285
0
+
×
23
15
286
0
+
×
24
15
287
0
+
×
25
15
288
0
+
×
26
15
289
0
+
×
27
15
290
0
+
×
28
15
291
0
+
×
27
29
15
292
0
+
×
30
15
293
0
+
×
28
July 2020
week
mon
tue
wed
thu
fri
sat
sun
27
01
15
294
0
+
×
02
15
295
0
+
×
03
15
296
0
+
×
04
15
297
0
+
×
05
15
298
0
+
×
28
06
15
299
0
+
×
07
15
300
0
+
×
08
15
301
0
+
×
09
15
302
0
+
×
10
15
303
0
+
×
11
15
304
0
+
×
12
15
305
0
+
×
29
13
15
306
0
+
×
14
15
307
0
+
×
15
15
308
0
+
×
16
15
309
0
+
×
17
15
310
0
+
×
18
15
311
0
+
×
19
15
312
0
+
×
30
20
15
313
0
+
×
21
15
314
0
+
×
22
15
315
0
+
×
23
15
316
0
+
×
24
15
317
0
+
×
25
15
318
0
+
×
26
15
319
0
+
×
31
27
15
320
0
+
×
28
15
321
0
+
×
29
15
322
0
+
×
30
15
323
0
+
×
31
15
324
0
+
×
32
August 2020
week
mon
tue
wed
thu
fri
sat
sun
31
01
15
325
0
+
×
02
15
326
0
+
×
32
03
15
327
0
+
×
04
15
328
0
+
×
05
15
329
0
+
×
06
15
330
0
+
×
07
15
331
0
+
×
08
15
332
0
+
×
09
15
333
0
+
×
33
10
15
334
0
+
×
11
15
335
0
+
×
12
15
336
0
+
×
13
15
337
0
+
×
14
15
338
0
+
×
15
15
339
0
+
×
16
15
340
0
+
×
34
17
15
341
0
+
×
18
15
342
0
+
×
19
15
343
0
+
×
20
15
344
0
+
×
21
15
345
0
+
×
22
15
346
0
+
×
23
15
347
0
+
×
35
24
15
348
0
+
×
25
15
349
0
+
×
26
15
350
0
+
×
27
15
351
0
+
×
28
15
352
0
+
×
29
15
353
0
+
×
30
15
354
0
+
×
36
31
15
355
0
+
×
September 2020
week
mon
tue
wed
thu
fri
sat
sun
36
01
15
356
0
+
×
02
15
357
0
+
×
03
15
358
0
+
×
04
15
359
0
+
×
05
15
360
0
+
×
06
15
361
0
+
×
37
07
15
362
0
+
×
08
15
363
0
+
×
09
15
364
0
+
×
10
15
365
0
+
×
11
15
366
0
+
×
12
15
367
0
+
×
13
15
368
0
+
×
38
39
40
41
 
Public holidays
Weekend days
Days to take
Holidays
Days to take:
45
Holidays length:
12
Optimization factor:
?
Copy
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