Every Day Counts
Zeisel Days
 
Age: 25,000 days
Date of birth
Your 9th Zeisel Day is on
Wednesday
when you will be
25,085 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
03 Feb 2026
25,000
today
68
03 Feb 2026
25,000
today
68
27 Mar 2026
25,052
52
68
29 Apr 2026
25,085
85
68
31 May 2026
25,117
117
68
22 Aug 2026
25,200
200
68
11 Nov 2026
25,281
281
69
14 Feb 2028
25,741
741
70
27 Jul 2031
27,000
2,000
73
08 Feb 2036
28,657
3,657
78
12 May 2047
32,768
7,768
89
27 Nov 2048
33,333
8,333
91
16 Sep 2052
34,722
9,722
95
16 May 2106
54,321
29,321
148
Ordinal
Day Age
Date
Age
1st
105
07 Dec 1957
0
2nd
1,419
13 Jul 1961
3
3rd
1,729
19 May 1962
4
4th
1,885
22 Oct 1962
5
5th
4,505
24 Dec 1969
12
6th
5,719
21 Apr 1973
15
7th
15,387
10 Oct 1999
42
8th
24,211
07 Dec 2023
66
9th
25,085
29 Apr 2026
68
1
10th
27,559
05 Feb 2033
75
11th
31,929
23 Jan 2045
87
12th
54,205
20 Jan 2106
148