A command line tool displaying a calendar and ephemeris of a geodate.
First you need to install Rust:
$ curl https://sh.rustup.rs -sSf | sh
Then you can install the latest stable version with cargo:
$ cargo install geocal
Or the development version by fetching the git repository:
$ git clone git://github.com/vinc/geocal.git
$ cd geocal
$ cargo install --path .
Run this tool with a latitude, a longitude, and optionally a timestamp, to get a calendar representation of a geodate:
$ geocal 51.1789 -1.8262 1403333333
+-------------------------+
| Date 0114-05-24 |
+-------------------------+
| So Me Ve Te Ma Ju Sa Lu |
| 00 01 02 03 04 05 06 |
| 07 08 09 10 11 12 13 14 |
| 15 16 17 18 19 20 21 |
| 22 23 24 25 26 27 28 29 |
+-------------------------+
| Time 27:76 |
+-------------------------+
There's also an ephemeris option:
$ geocal 51.1789 -1.8262 1403333333 --ephem
+-------------------------+
| Date 0114-05-24 |
+-------------------------+
| So Me Ve Te Ma Ju Sa Lu |
| 00 01 02 03 04 05 06 |
| 07 08 09 10 11 12 13 14 |
| 15 16 17 18 19 20 21 |
| 22 23 24 25 26 27 28 29 |
+-------------------------+
| Time 27:76 |
+-------------------------+
| Moonrise 01:57 |
| Sunrise 15:46 |
| Solstice 44:61 |
| Moonset 58:86 |
| Sunset 84:53 |
+-------------------------+
And a solar calendar option instead of the lunisolar calendar to keep track of the seasons:
$ geocal 51.1789 -1.8262 1403333333 --ephem --solar
+-------------------------------+
| Date 0114-02-00 |
+-------------------------------+
| So Me Ve Te Ma Ju Sa Ur Ne Lu |
| 00 01 02 03 04 05 06 07 08 09 |
| 10 11 12 13 14 15 16 17 18 19 |
| 20 21 22 23 24 25 26 27 28 29 |
| 30 31 32 33 34 35 36 37 38 39 |
| 40 41 42 43 44 45 46 47 48 49 |
| 50 51 52 53 54 55 56 57 58 59 |
| 60 61 62 63 64 65 66 67 68 69 |
| 70 71 72 73 74 75 76 77 78 79 |
| 80 81 82 83 84 85 86 87 88 89 |
| 90 91 92 93 |
+-------------------------------+
| Time 27:76 |
+-------------------------------+
| Moonrise 01:57 |
| Sunrise 15:46 |
| Solstice 44:61 |
| Moonset 58:86 |
| Sunset 84:53 |
+-------------------------------+
Copyright (c) 2019-2023 Vincent Ollivier. Released under the MIT License.