Every Day Counts
Hexagonal Days
 
Age: 16,437 days
Date of birth
Your 75th Hexagonal Day is on
Saturday
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
11 Jan 2019
16,461
24
45
21 Jan 2019
16,471
34
45
28 Mar 2019
16,537
100
45
10 Jul 2019
16,641
204
45
20 Jul 2019
16,651
214
45
05 Aug 2019
16,667
230
45
03 Jul 2020
17,000
563
46
30 Jan 2022
17,576
1,139
48
14 Jun 2022
17,711
1,274
48
20 Oct 2034
22,222
5,785
60
03 May 2037
23,148
6,711
63
31 Mar 2040
24,211
7,774
66
04 Sep 2063
32,768
16,331
89
08 Sep 2122
54,321
37,884
148
Ordinal
Day Age
Date
Age
74th
16,207
02 May 2018
44
75th
16,651
20 Jul 2019
45
1
76th
17,101
12 Oct 2020
46
77th
17,557
11 Jan 2022
48
78th
18,019
18 Apr 2023
49
79th
18,487
29 Jul 2024
50
80th
18,961
15 Nov 2025
51
81st
19,441
10 Mar 2027
53
82nd
19,927
08 Jul 2028
54
83rd
20,419
12 Nov 2029
55
84th
20,917
25 Mar 2031
57
85th
21,421
10 Aug 2032
58
86th
21,931
02 Jan 2034
60
87th
22,447
02 Jun 2035
61
88th
22,969
05 Nov 2036
62
89th
23,497
17 Apr 2038
64
90th
24,031
03 Oct 2039
65
91st
24,571
26 Mar 2041
67
92nd
25,117
23 Sep 2042
68
93rd
25,669
28 Mar 2044
70