Date and Time
| Link | Site | Notes |
| https://time.is/ | Verify the time settting on your computer. Essestial for HF digital modes. | |
| http://www.thinkman.com/dimension4/ | Tool to automatically and accurately set your computer time. Essential for digital modes. | |
| http://www.timebie.com/std/utc.php | Calculate time zones. | |
| https://www.timeanddate.com/ | Outstanding and fun site for anything to do with dates and time. | |