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Calendars


Brief Description (including a definition if possible)

A calendar is a system of organizing days for a social, organizational, commercial or administrative purpose. This organization is done by giving names to periods of time - typically days, weeks, months and years. The name given to each day is known as a date. Periods in a calendar (such as years and months) are usually, though not necessarily, synchronized with the cycles of some astronomical phenomenon, such as the cycle of the sun, or the moon. Many civilizations and societies have devised a calendar, usually derived from other calendars on which they model their systems, suited to their particular needs.

A calendar is also a physical device (often paper). This is the most common usage of the word. Other similar types of calendars can include computerized systems, which can be set to remind the user of upcoming events and appointments.

A calendar is often used to denote a list of particular set of planned events (for example, court calendar) and to mark days for social, religious, commercial, or administrative purposes.

The English word calendar is derived from the Latin word kalendae, which was the Latin name of the first day of every month.

History (if applicable)


The history of calendars spans several thousand years. In many early civilizations, calendar systems were developed. For example, in Summer, the birthplace of the modern sexagesimal system, there were 12 months of 29 or 30 days apiece, much like the modern Gregorian calendar. Mesoamerican cultures also developed their own intricate calendars; the ancient Maya had two separate years—the 260-day Sacred Round, and the 365-day Vague Year. Classical Greek and Roman cultures also developed calendars; the ancient Athenians, for one, had a lunisolar calendar that lasted 364 days, with an intercalary month added every other year. The Romans used two different year lengths; the older one had 304 days divided into 10 months; the newer 365 days divided into 12 months; very much like the modern calendar. They counted years from the founding of Rome, or, sometimes, from the reign of the current consul.

Read full history of calendars(Wikipedia)

When to use


You should consider your calendar holy ground. Nothing goes on your calendar unless it’s a must and time sensitive. That is why we advise you to put appointments there (obviously) and deadlines because they are both items that occur at a specific day and time, where something has to happen.

Do not put things on there that have random or arbitrary deadlines. This will fill up your calendar unnecessarily. For example, you want book a vacation to Maui, but you have no clue yet when you want to do it so you just put it on Tuesday at 7pm. Try to avoid calendar items like this. Instead, put those items in your to do list and then plan when you can do them.

Again, your calendar is holy. Only put in the important and time sensitive items.

How to use


You can use a wall calendar or software/online, it doesn’t really matter. The functionality is the same, but we find that using software/online calendar will give more flexibility and is more efficient. Especially when you use it together with a to-do list, as you will read later.

Now what should go in your calendar? In our opinion, you should put the following on your calendar:
Appointments (dentist, meetings, etc).
Deadlines (handing in report, filing taxes, etc).
Events (workshops, seminars, pay day, birthdays, holidays, etc).
Time sensitive errands (buying something before store closing time).
Focus time (when you set time aside to work on something important and no one can disturb you).

Tips and Lessons Learnt


TIPS: Organizing your schedule shouldn’t be a burden. With Calendar software or online Calendar, it’s easy to keep track of life’s important events all in one place.

Share your schedule: Let your co-workers, family, and friends see your calendar, and view schedules that others have shared with you. When you know when everyone is free or busy, scheduling is a snap.
Get your calendar on the go: With two-way syncing to your mobile phone’s built-in calendar or a mobile version of Google Calendar that’s made for the small screen, you can access your calendar while you’re away from your desk.
Never forget another event again: Customizable reminders help you stay on schedule. You can choose to be notified by email or get a text message sent right to your mobile phone.
Send invitations and track RSVPs: Invite other people to events on your calendar. Guests can RSVP to your events by email or via Google Calendar.
Sync with your desktop applications: Access your calendar however and whenever you want by syncing events with Microsoft Outlook, Apple iCal and Mozilla Sunbird.
Work offline: Know where you’re supposed to be even when you don’t have internet access. With offline access, you can view a read-only version of your calendar no matter where you are.

Examples & Stories

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Who can tell me more?

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Related Methods / Tools / Practices


Google Calendar (web)
Microsoft Outlook (Windows)
BusyCal (OS X)

Resources (add your resources)

(URLs, photos, podcasts)
A Short History of the Modern Calendar (Youtube Video)
CPsquare / Digital Habitat page on Calendars

Keywords, Tags

to do list, calendar

Photo or image credits

Image credit for the calendar: Western Michigan University

Page Authors

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