Every Day Counts
Hexagonal Days
 
Age: 16,405 days
Date of birth
Your 75th Hexagonal Day is on
Thursday
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
06 Feb 2019
16,461
56
45
16 Feb 2019
16,471
66
45
23 Apr 2019
16,537
132
45
05 Aug 2019
16,641
236
45
15 Aug 2019
16,651
246
45
31 Aug 2019
16,667
262
45
29 Jul 2020
17,000
595
46
25 Feb 2022
17,576
1,171
48
10 Jul 2022
17,711
1,306
48
15 Nov 2034
22,222
5,817
60
29 May 2037
23,148
6,743
63
26 Apr 2040
24,211
7,806
66
30 Sep 2063
32,768
16,363
89
04 Oct 2122
54,321
37,916
148
Ordinal
Day Age
Date
Age
74th
16,207
28 May 2018
44
75th
16,651
15 Aug 2019
45
1
76th
17,101
07 Nov 2020
46
77th
17,557
06 Feb 2022
48
78th
18,019
14 May 2023
49
79th
18,487
24 Aug 2024
50
80th
18,961
11 Dec 2025
51
81st
19,441
05 Apr 2027
53
82nd
19,927
03 Aug 2028
54
83rd
20,419
08 Dec 2029
55
84th
20,917
20 Apr 2031
57
85th
21,421
05 Sep 2032
58
86th
21,931
28 Jan 2034
60
87th
22,447
28 Jun 2035
61
88th
22,969
01 Dec 2036
62
89th
23,497
13 May 2038
64
90th
24,031
29 Oct 2039
65
91st
24,571
21 Apr 2041
67
92nd
25,117
19 Oct 2042
68
93rd
25,669
23 Apr 2044
70