Every Day Counts
Hexagonal Days
 
Age: 16,213 days
Date of birth
Your 75th Hexagonal Day is on
Monday
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
08 Aug 2018
16,261
48
44
06 Sep 2018
16,290
77
44
09 Dec 2018
16,384
171
44
09 Dec 2018
16,384
171
44
11 May 2019
16,537
324
45
02 Sep 2019
16,651
438
45
18 Sep 2019
16,667
454
45
16 Aug 2020
17,000
787
46
15 Mar 2022
17,576
1,363
48
28 Jul 2022
17,711
1,498
48
03 Dec 2034
22,222
6,009
60
16 Jun 2037
23,148
6,935
63
14 May 2040
24,211
7,998
66
22 Oct 2122
54,321
38,108
148
Ordinal
Day Age
Date
Age
74th
16,207
15 Jun 2018
44
75th
16,651
02 Sep 2019
45
1
76th
17,101
25 Nov 2020
46
77th
17,557
24 Feb 2022
48
78th
18,019
01 Jun 2023
49
79th
18,487
11 Sep 2024
50
80th
18,961
29 Dec 2025
51
81st
19,441
23 Apr 2027
53
82nd
19,927
21 Aug 2028
54
83rd
20,419
26 Dec 2029
55
84th
20,917
08 May 2031
57
85th
21,421
23 Sep 2032
58
86th
21,931
15 Feb 2034
60
87th
22,447
16 Jul 2035
61
88th
22,969
19 Dec 2036
62
89th
23,497
31 May 2038
64
90th
24,031
16 Nov 2039
65
91st
24,571
09 May 2041
67
92nd
25,117
06 Nov 2042
68
93rd
25,669
11 May 2044
70