Every Day Counts
Zeisel Days
 
Age: 15,380 days
Date of birth
Your 7th Zeisel Day is on
Sunday
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
21 Sep 2025
15,387
7
42
04 Oct 2025
15,400
20
42
24 Nov 2025
15,451
71
42
17 May 2026
15,625
245
42
17 May 2026
15,625
245
42
08 Oct 2026
15,769
389
43
01 Mar 2027
15,913
533
43
29 Apr 2027
15,972
592
43
27 May 2027
16,000
620
43
14 Jun 2028
16,384
1,004
44
01 Feb 2032
17,711
2,331
48
08 Jun 2044
22,222
6,842
60
21 Dec 2046
23,148
7,768
63
27 Apr 2132
54,321
38,941
148
Ordinal
Day Age
Date
Age
1st
105
19 Nov 1983
0
2nd
1,419
25 Jun 1987
3
3rd
1,729
30 Apr 1988
4
4th
1,885
03 Oct 1988
5
5th
4,505
06 Dec 1995
12
6th
5,719
03 Apr 1999
15
7th
15,387
21 Sep 2025
42
1
8th
24,211
18 Nov 2049
66
9th
25,085
10 Apr 2052
68
10th
27,559
18 Jan 2059
75
11th
31,929
05 Jan 2071
87
12th
54,205
02 Jan 2132
148