VueMinder Lite USB is a free calendar program that doesn't require installation. It looks good and offers all the features you'd want to stay organized and on time.
You'll have to extract VueMinder Lite USB's executable file from the ZIP file it comes in. When you first open it, you'll be prompted to upgrade to the Pro version, but you can opt out of that. Then just click the tiny calendar icon in your taskbar to view your calendar. The interface is polished and professional, with a standard File menu and toolbar at the top and a large calendar of the current or selected month dominating the lower left of the window. On the right is a smaller calendar, a list of your calendars, and a list of the events for that day. You can add your Google Calendars to the list, which is a nice touch. There's also an option to share calendars, but that requires a paid upgrade. You can customize the look of the calendar, although the default looks fine as is. VueMinder Lite USB offers all the expected calendar amenities, allowing you to add events, set reminders, and schedule recurring events. While the program did freeze up once when trying to access the File menu, it worked well, overall.
If you don't yet have a calendar program and like the idea of one that's portable, this is a solid free option.
VueMinder Lite USB is a free calendar program that can run from a USB stick. It requires no installation and won't modify your computer in any way. Simply download, extract, and run on any Windows PC - even if you don't have administrator rights. If you're looking for the perfect offline PC-based companion to Google Calendar, you've found it in VueMinder, which supports automatic synchronization with Google Calendar and can show your schedule regardless of whether you happen to be online or offline. A calendar browser allows addition of many calendars, such as holidays, local weather, sport schedules, religious occasions, and more. You can also create your own calendars, which are overlaid into day, week, and month views. Events can be filtered or color-coded based on associated calendar, category, priority, or location. Events are also visible on the Windows desktop, where a transparent desktop calendar turns your old Windows desktop into something entirely new and useful. ICS calendar subscriptions are fully supported, along with the ability to import or export ICS files. Calendars can be saved as web pages (HTML) for publication to your website or sharing with others. Print features are also provided, with a number of layout styles and a preview window that dynamically refreshes to show exactly what will be printed. VueMinder truly shines in the way it presents reminders, which can be either popup windows or unobtrusive desktop alerts. Reminders can be configured to play media files or even recite text-to-speech descriptions. If your computer speakers are turned up, you'll be able to hear the details of your reminder from another room - no more wondering what the computer is beeping about. If you're familiar with Microsoft Outlook, VueMinder will feel instantly familiar. Even if you've never used Outlook, VueMinder is very intuitive and easy to learn, with many convenient touches, such as the ability to undo accidental reminder dismissal.