Today had been the worst day of my life. seems awkward, as today is not understood to mean on this day (the original meaning). In narrative, an event that is happened in the past is narrated as it is the present, as in: It is the 1st of April, 2006. Today will be the worst day of my life. Outside that specific context, I would write
MSN: Freya Skye extends Stars Align tour with 36 new dates across US., Europe & Australia
After selling out February and March tour dates across North America and her native U.K., Freya Skye is extending her Stars Align Tour with 36 new dates in the U.S., Europe and Australia, Billboard ...
Freya Skye extends Stars Align tour with 36 new dates across US., Europe & Australia
Today means "the current day", so if you're asking what day of the week it is, it can only be in present tense, since it's still that day for the whole 24 hours. In other contexts, it's okay to say, for example, "Today has been a nice day" nearer the end of the day, when the events that made it a nice day are finished (or at least, nearly so).
Today Was vs Today Is - English Language & Usage Stack Exchange
Question: What are the origins and history of using on tomorrow, on today, and on yesterday ** (which in standard Englishes are just tomorrow, today, and yesterday)? Examples: US Journal of the Senate (2006, all bold font added): ORDERS FOR ADJOURNMENT UNTIL 9 A.M. ON TOMORROW ...
american english - Origins and history of "on tomorrow", "on today ...