Every Day Counts
Hexagonal Days
 
Age: 16,302 days
Date of birth
Your 75th Hexagonal Day is on
Friday
when you will be
16,651 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
18 Sep 2018
16,361
59
44
11 Oct 2018
16,384
82
44
11 Oct 2018
16,384
82
44
06 Jan 2019
16,471
169
45
13 Mar 2019
16,537
235
45
05 Jul 2019
16,651
349
45
21 Jul 2019
16,667
365
45
18 Jun 2020
17,000
698
46
15 Jan 2022
17,576
1,274
48
30 May 2022
17,711
1,409
48
05 Oct 2034
22,222
5,920
60
18 Apr 2037
23,148
6,846
63
16 Mar 2040
24,211
7,909
66
24 Aug 2122
54,321
38,019
148
Ordinal
Day Age
Date
Age
74th
16,207
17 Apr 2018
44
75th
16,651
05 Jul 2019
45
1
76th
17,101
27 Sep 2020
46
77th
17,557
27 Dec 2021
48
78th
18,019
03 Apr 2023
49
79th
18,487
14 Jul 2024
50
80th
18,961
31 Oct 2025
51
81st
19,441
23 Feb 2027
53
82nd
19,927
23 Jun 2028
54
83rd
20,419
28 Oct 2029
55
84th
20,917
10 Mar 2031
57
85th
21,421
26 Jul 2032
58
86th
21,931
18 Dec 2033
60
87th
22,447
18 May 2035
61
88th
22,969
21 Oct 2036
62
89th
23,497
02 Apr 2038
64
90th
24,031
18 Sep 2039
65
91st
24,571
11 Mar 2041
67
92nd
25,117
08 Sep 2042
68
93rd
25,669
13 Mar 2044
70