Every Day Counts
Hexagonal Days
 
Age: 16,218 days
Date of birth
Your 75th Hexagonal Day is on
Tuesday
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
05 Dec 2019
16,261
43
44
03 Jan 2020
16,290
72
44
06 Apr 2020
16,384
166
44
06 Apr 2020
16,384
166
44
06 Sep 2020
16,537
319
45
29 Dec 2020
16,651
433
45
14 Jan 2021
16,667
449
45
13 Dec 2021
17,000
782
46
12 Jul 2023
17,576
1,358
48
24 Nov 2023
17,711
1,493
48
31 Mar 2036
22,222
6,004
60
13 Oct 2038
23,148
6,930
63
10 Sep 2041
24,211
7,993
66
18 Feb 2124
54,321
38,103
148
Ordinal
Day Age
Date
Age
74th
16,207
12 Oct 2019
44
75th
16,651
29 Dec 2020
45
1
76th
17,101
24 Mar 2022
46
77th
17,557
23 Jun 2023
48
78th
18,019
27 Sep 2024
49
79th
18,487
08 Jan 2026
50
80th
18,961
27 Apr 2027
51
81st
19,441
19 Aug 2028
53
82nd
19,927
18 Dec 2029
54
83rd
20,419
24 Apr 2031
55
84th
20,917
03 Sep 2032
57
85th
21,421
20 Jan 2034
58
86th
21,931
14 Jun 2035
60
87th
22,447
11 Nov 2036
61
88th
22,969
17 Apr 2038
62
89th
23,497
27 Sep 2039
64
90th
24,031
14 Mar 2041
65
91st
24,571
05 Sep 2042
67
92nd
25,117
04 Mar 2044
68
93rd
25,669
07 Sep 2045
70