Every Day Counts
Zeisel Days
 
Age: 15,377 days
Date of birth
Your 7th Zeisel Day is on
Thursday
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
02 Apr 2026
15,387
10
42
15 Apr 2026
15,400
23
42
05 Jun 2026
15,451
74
42
26 Nov 2026
15,625
248
42
26 Nov 2026
15,625
248
42
19 Apr 2027
15,769
392
43
10 Sep 2027
15,913
536
43
08 Nov 2027
15,972
595
43
06 Dec 2027
16,000
623
43
24 Dec 2028
16,384
1,007
44
12 Aug 2032
17,711
2,334
48
18 Dec 2044
22,222
6,845
60
02 Jul 2047
23,148
7,771
63
06 Nov 2132
54,321
38,944
148
Ordinal
Day Age
Date
Age
1st
105
30 May 1984
0
2nd
1,419
04 Jan 1988
3
3rd
1,729
09 Nov 1988
4
4th
1,885
14 Apr 1989
5
5th
4,505
16 Jun 1996
12
6th
5,719
13 Oct 1999
15
7th
15,387
02 Apr 2026
42
1
8th
24,211
30 May 2050
66
9th
25,085
20 Oct 2052
68
10th
27,559
30 Jul 2059
75
11th
31,929
17 Jul 2071
87
12th
54,205
13 Jul 2132
148