Every Day Counts
Hexagonal Days
 
Age: 21,415 days
Date of birth
Your 85th Hexagonal Day is on
Monday
when you will be
21,421 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
29 Jan 2018
21,421
6
58
30 Apr 2018
21,512
97
58
16 May 2018
21,528
113
58
16 May 2018
21,528
113
58
05 Aug 2018
21,609
194
59
14 Jul 2019
21,952
537
60
23 Jul 2019
21,961
546
60
31 Aug 2019
22,000
585
60
09 Apr 2020
22,222
807
60
22 Oct 2022
23,148
1,733
63
19 Sep 2025
24,211
2,796
66
21 Nov 2037
28,657
7,242
78
22 Feb 2049
32,768
11,353
89
27 Feb 2108
54,321
32,906
148
Ordinal
Day Age
Date
Age
84th
20,917
12 Sep 2016
57
85th
21,421
29 Jan 2018
58
1
86th
21,931
23 Jun 2019
60
87th
22,447
20 Nov 2020
61
88th
22,969
26 Apr 2022
62
89th
23,497
06 Oct 2023
64
90th
24,031
23 Mar 2025
65
91st
24,571
14 Sep 2026
67
92nd
25,117
13 Mar 2028
68
93rd
25,669
16 Sep 2029
70
94th
26,227
28 Mar 2031
71
95th
26,791
12 Oct 2032
73
96th
27,361
05 May 2034
74
97th
27,937
02 Dec 2035
76
98th
28,519
06 Jul 2037
78
99th
29,107
14 Feb 2039
79
100th
29,701
30 Sep 2040
81
101st
30,301
23 May 2042
82
102nd
30,907
19 Jan 2044
84
103rd
31,519
22 Sep 2045
86