For those who rely heavily on Google Tasks and Calendar for Android, you may want to check out Day by Day, a feature packed app developed by XDA Forum Member appiens.
In essence, Day by Day combines a to-do list and calendar into one single app for your Android device. It does this with a pleasant Holo user interface with 2 horizontally sliding screens, one of which is a tasks list and the other is a calendar. The task screen lists all tasks drawn from your Google Tasks, and all calendar events planned with Google Calendar as well as any other calendar that may be synced to your device.
The calendar screen is quite standard, displaying the present month, and tasks and events of the selected date. Both tasks and events can be created and edited with ease, and are automatically synced with Google. If you would like to wish a friend a happy birthday, selecting the event will bring up the option to view the friend in your contacts list. Swiping right on tasks and events allow for quick deletion of the selected. There is widget support, and 20 aesthetic themes for you to choose from.
Day by Day is an app that will definitely help you with day by day tasks and events. It’s easily navigable with a logical interface, and nicely keeps all your task and event synchronization in one place. Appiens has made this available to all users of Android 2.2 and newer, and can be downloaded for free from the Play store. So if this interests you, check out the original thread for more details._________