I want to generate the file .

calendar.json

day
1
day
2
day
3
day
4
day
5
day
6
day
7
day
8
day
9
day
10
day
11
day
12
day
13
day
14
day
15
day
16
day
17
day
18
day
19
day
20
day
21
day
22
day
23
day
24
day
25
day
26
day
27
day
28
day
29
day
30
day
31

AdventCalendar Generator by Nicolas Devenet

AdventCalendar