Every Day Counts
Zeisel Days
 
Age: 15,377 days
Date of birth
Your 7th Zeisel Day is on
Tuesday
when you will be
15,387 days old

A Zeisel Day occurs when your day age is a Zeisel number.

A Zeisel number, named after Helmut Zeisel, is a square-free integer k with at least three prime factors which fall into the pattern

px = apx - 1 + b

where a and b are some integer constants and x is the index number of each prime factor in the factorization, sorted from lowest to highest.

Who would not want to celebrate that?

Remind me, please


Next Main Events
Day Age
Event
Days Ahead
Year Age
30 Jun 2026
15,387
10
42
13 Jul 2026
15,400
23
42
02 Sep 2026
15,451
74
42
23 Feb 2027
15,625
248
42
23 Feb 2027
15,625
248
42
17 Jul 2027
15,769
392
43
08 Dec 2027
15,913
536
43
05 Feb 2028
15,972
595
43
04 Mar 2028
16,000
623
43
23 Mar 2029
16,384
1,007
44
09 Nov 2032
17,711
2,334
48
17 Mar 2045
22,222
6,845
60
29 Sep 2047
23,148
7,771
63
03 Feb 2133
54,321
38,944
148
Ordinal
Day Age
Date
Age
1st
105
27 Aug 1984
0
2nd
1,419
02 Apr 1988
3
3rd
1,729
06 Feb 1989
4
4th
1,885
12 Jul 1989
5
5th
4,505
13 Sep 1996
12
6th
5,719
10 Jan 2000
15
7th
15,387
30 Jun 2026
42
1
8th
24,211
27 Aug 2050
66
9th
25,085
17 Jan 2053
68
10th
27,559
27 Oct 2059
75
11th
31,929
14 Oct 2071
87
12th
54,205
10 Oct 2132
148