NikaTime is used to track what you've worked on, so it shouldn't be possible to log time for future dates, right?
Well... Not quite! There are two situations when you can log your time in advance:
Schedule Time Off
You can schedule time off through Slack and through the Report Center. You can learn more about it here.
When you usually log the same amount of hours on the same project, after some time NikaTime will start asking you if you wish to log the same hours for the next 3 days or the next week. You can learn more about this feature here.