Every Day Counts
Hexagonal Days
 
Age: 21,413 days
Date of birth
Your 85th Hexagonal Day is on
Friday
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 Jun 2018
21,421
8
58
28 Sep 2018
21,512
99
58
14 Oct 2018
21,528
115
58
14 Oct 2018
21,528
115
58
03 Jan 2019
21,609
196
59
12 Dec 2019
21,952
539
60
21 Dec 2019
21,961
548
60
29 Jan 2020
22,000
587
60
07 Sep 2020
22,222
809
60
22 Mar 2023
23,148
1,735
63
17 Feb 2026
24,211
2,798
66
21 Apr 2038
28,657
7,244
78
23 Jul 2049
32,768
11,355
89
27 Jul 2108
54,321
32,908
148
Ordinal
Day Age
Date
Age
84th
20,917
10 Feb 2017
57
85th
21,421
29 Jun 2018
58
1
86th
21,931
21 Nov 2019
60
87th
22,447
20 Apr 2021
61
88th
22,969
24 Sep 2022
62
89th
23,497
05 Mar 2024
64
90th
24,031
21 Aug 2025
65
91st
24,571
12 Feb 2027
67
92nd
25,117
11 Aug 2028
68
93rd
25,669
14 Feb 2030
70
94th
26,227
26 Aug 2031
71
95th
26,791
12 Mar 2033
73
96th
27,361
03 Oct 2034
74
97th
27,937
01 May 2036
76
98th
28,519
04 Dec 2037
78
99th
29,107
15 Jul 2039
79
100th
29,701
28 Feb 2041
81
101st
30,301
21 Oct 2042
82
102nd
30,907
18 Jun 2044
84
103rd
31,519
20 Feb 2046
86