I have a weird WeChat username that contains a number, and I have a weird habit which is to change that number every day, usually following simple patterns like counting up or down in decimal, binary, base-6, base-5, and so on. My mom also have a weird habit, which is to track that number every day. So I wonder, why not turn this into a calendar-based rule-discovery game? You can check your answer with me once you think you get it.
Rule 2
3/14/2026: 63440
3/13/2026: 63438
3/12/2026: 63436
3/11/2026: 63434
3/10/2026: 63432
3/9/2026: 63430
3/8/2026: 63428
3/7/2026: 63426
3/6/2026: 63424
3/5/2026: 63422
3/4/2026: 63420
3/3/2026: 63418
3/2/2026: 63416
3/1/2026: 63414
2/28/2026: 63340
2/27/2026: 63338
2/26/2026: 63336
2/25/2026: 63334
2/24/2026: 63332
2/23/2026: 63330
2/22/2026: 63328
2/21/2026: 63326
2/20/2026: 63324
2/19/2026: 63322
2/18/2026: 63320
Rule 1
2/17/2026: 145026
2/16/2026: 145024
2/15/2026: 145022
2/14/2026: 145020
2/13/2026: 145018
2/12/2026: 145016
2/11/2026: 145014
2/10/2026: 145012
2/9/2026: 145010
2/8/2026: 145008
2/7/2026: 145006
2/6/2026: 145004
2/5/2026: 145002
2/4/2026: 145000
2/3/2026: 144026
2/2/2026: 144024
2/1/2026: 144022
1/31/2026: 66011
1/30/2026: 66010
1/29/2026: 66009
1/28/2026: 66008
1/27/2026: 66007
1/26/2026: 66006
1/25/2026: 66005
1/24/2026: 66004
1/23/2026: 66003
1/22/2026: 66002
1/21/2026: 66001
1/20/2026: 66000
1/19/2026: 65030
1/18/2026: 65029
1/17/2026: 65028
1/16/2026: 65027
1/15/2026: 65026
1/14/2026: 65025
1/13/2026: 65024
1/12/2026: 65023
1/11/2026: 65022
1/10/2026: 65021
1/9/2026: 65020
1/8/2026: 65019
1/7/2026: 65018
1/6/2026: 65017
1/5/2026: 65016
1/4/2026: 65015
1/3/2026: 65014
1/2/2026: 65013
1/1/2026: 65012
12/31/2025: 715527
12/30/2025: 715515
12/29/2025: 715503
12/28/2025: 714622
12/27/2025: 714610
12/26/2025: 713729
12/25/2025: 713717
12/24/2025: 713705
12/23/2025: 712824
12/22/2025: 712812
12/21/2025: 712800
12/20/2025: 711919
12/19/2025: 711907
12/18/2025: 711026
12/17/2025: 711014
12/16/2025: 711002
12/15/2025: 710121
12/14/2025: 710109
12/13/2025: 709228
12/12/2025: 709216
12/11/2025: 709204
12/10/2025: 708323
12/9/2025: 708311
12/8/2025: 707430
12/7/2025: 707418
12/6/2025: 707406
12/5/2025: 706525
12/4/2025: 706513
12/3/2025: 706501
12/2/2025: 705620
12/1/2025: 705608
11/30/2025: 677715
11/29/2025: 677704