Every Day Counts
Hexagonal Days
 
Age: 16,270 days
Date of birth
Your 75th Hexagonal Day is on
Sunday
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
10 Oct 2018
16,290
20
44
20 Dec 2018
16,361
91
44
12 Jan 2019
16,384
114
44
12 Jan 2019
16,384
114
44
14 Jun 2019
16,537
267
45
06 Oct 2019
16,651
381
45
22 Oct 2019
16,667
397
45
19 Sep 2020
17,000
730
46
18 Apr 2022
17,576
1,306
48
31 Aug 2022
17,711
1,441
48
06 Jan 2035
22,222
5,952
60
20 Jul 2037
23,148
6,878
63
17 Jun 2040
24,211
7,941
66
25 Nov 2122
54,321
38,051
148
Ordinal
Day Age
Date
Age
74th
16,207
19 Jul 2018
44
75th
16,651
06 Oct 2019
45
1
76th
17,101
29 Dec 2020
46
77th
17,557
30 Mar 2022
48
78th
18,019
05 Jul 2023
49
79th
18,487
15 Oct 2024
50
80th
18,961
01 Feb 2026
51
81st
19,441
27 May 2027
53
82nd
19,927
24 Sep 2028
54
83rd
20,419
29 Jan 2030
55
84th
20,917
11 Jun 2031
57
85th
21,421
27 Oct 2032
58
86th
21,931
21 Mar 2034
60
87th
22,447
19 Aug 2035
61
88th
22,969
22 Jan 2037
62
89th
23,497
04 Jul 2038
64
90th
24,031
20 Dec 2039
65
91st
24,571
12 Jun 2041
67
92nd
25,117
10 Dec 2042
68
93rd
25,669
14 Jun 2044
70