Every Day Counts
Hexagonal Days
 
Age: 17,371 days
Date of birth
Your 77th Hexagonal Day is on
Thursday
when you will be
17,557 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
21 Oct 2018
17,371
today
47
10 Nov 2018
17,391
20
47
13 Dec 2018
17,424
53
47
25 Apr 2019
17,557
186
48
14 May 2019
17,576
205
48
26 Sep 2019
17,711
340
48
14 Jan 2020
17,821
450
48
11 Jul 2020
18,000
629
49
05 Sep 2020
18,056
685
49
01 Feb 2032
22,222
4,851
60
15 Aug 2034
23,148
5,777
63
13 Jul 2037
24,211
6,840
66
16 Dec 2060
32,768
15,397
89
21 Dec 2119
54,321
36,950
148
Ordinal
Day Age
Date
Age
76th
17,101
24 Jan 2018
46
77th
17,557
25 Apr 2019
48
1
78th
18,019
30 Jul 2020
49
79th
18,487
10 Nov 2021
50
80th
18,961
27 Feb 2023
51
81st
19,441
21 Jun 2024
53
82nd
19,927
20 Oct 2025
54
83rd
20,419
24 Feb 2027
55
84th
20,917
06 Jul 2028
57
85th
21,421
22 Nov 2029
58
86th
21,931
16 Apr 2031
60
87th
22,447
13 Sep 2032
61
88th
22,969
17 Feb 2034
62
89th
23,497
30 Jul 2035
64
90th
24,031
14 Jan 2037
65
91st
24,571
08 Jul 2038
67
92nd
25,117
05 Jan 2040
68
93rd
25,669
10 Jul 2041
70
94th
26,227
19 Jan 2043
71
95th
26,791
05 Aug 2044
73