Every Day Counts
Hexagonal Days
 
Age: 15,343 days
Date of birth
Your 73rd Hexagonal Day is on
Monday
when you will be
15,769 days old

Hexagonal Days occur when your day age is a centred hexagonal number.

A centred hexagonal number, or hex number, is a centred figurate number that represents a hexagon with a dot in the centre and all other dots surrounding the centre dot in a hexagonal lattice.

Strictly, a hexagonal number is the number of distinct dots in a pattern of dots consisting of the outlines of regular hexagons with sides up to n dots, when the hexagons are overlaid so that they share one vertex.

We choose to use centred hexagonal numbers to calculate our Hexagonal Days because all (outlined) hexagonal numbers are also triangular numbers and these are already commemorated in our Triangular Days.

Centred Hexagonal
1
7
19
37
61
91
Hexagonal
1
6
15
28
45
66
91
Triangular
1
3
6
10
15
21
28
36
45
55
66
78
91

Remind me, please


Next Main Events
Day Age
Event
Days Ahead
Year Age
31 Jan 2018
15,351
8
42
25 Feb 2018
15,376
33
42
08 Mar 2018
15,387
44
42
21 Mar 2018
15,400
57
42
01 Nov 2018
15,625
282
42
25 Mar 2019
15,769
426
43
16 Aug 2019
15,913
570
43
14 Oct 2019
15,972
629
43
11 Nov 2019
16,000
657
43
29 Nov 2020
16,384
1,041
44
18 Jul 2024
17,711
2,368
48
23 Nov 2036
22,222
6,879
60
07 Jun 2039
23,148
7,805
63
12 Oct 2124
54,321
38,978
148
Ordinal
Day Age
Date
Age
72nd
15,337
17 Jan 2018
41
73rd
15,769
25 Mar 2019
43
1
74th
16,207
05 Jun 2020
44
75th
16,651
23 Aug 2021
45
76th
17,101
16 Nov 2022
46
77th
17,557
15 Feb 2024
48
78th
18,019
22 May 2025
49
79th
18,487
02 Sep 2026
50
80th
18,961
20 Dec 2027
51
81st
19,441
13 Apr 2029
53
82nd
19,927
12 Aug 2030
54
83rd
20,419
17 Dec 2031
55
84th
20,917
28 Apr 2033
57
85th
21,421
14 Sep 2034
58
86th
21,931
06 Feb 2036
60
87th
22,447
06 Jul 2037
61
88th
22,969
10 Dec 2038
62
89th
23,497
21 May 2040
64
90th
24,031
06 Nov 2041
65
91st
24,571
30 Apr 2043
67