You can now save tweets as drafts and schedule them for later

Twitter is becoming a lot more user friendly. Quite recently, a threaded interface was rolled out to make conversations more manageable.
Draft Tweets
When you are in the middle of writing a tweet and have to leave it midway for some reason, you can now save it as a draft. Just tap ‘X’ and then select ‘Save’ to ensure the unfinished tweet is not discarded. To access it later, select Unsent Tweets and you will be able to view all your drafts.
Also, for tweets to be saved as drafts, you should use the popup composer.
We think Twitter will refine the feature further in the coming days.
Schedule Tweets
Twitter also lets you schedule your tweets now. Just tap on the calendar/clock icon and then select the date and time on which you want the tweet to be sent.
While an average user might not find much utility in this feature, it will be incredibly useful for marketers and social media managers.