Short for Unified Extensible Firmware Interface, UEFI is a specification that defines a more modernized model for the interface between computer operating systems and platform firmware during the boot, or start-up, process.hort for Unified Extensible Firmware Interface, UEFI is a specification that defines a more modernized model for the interface between computer operating systems and platform firmware during the boot, or start-up, process.
The original Roman calendar is believed to have been a lunar calendar, which may have been based on one of the Greek lunar calendars. As the time between new moons averages 29.5 days its months were constructed to be either hollow (29 days) or full (30 days).he calendar year originally began on 1 March, as is shown by the names of the six months following June (Quintilis = fifth month, Sextilis = sixth month, September = seventh month, etc.).
These he made into two months, January and February, which he prefixed to the previous 10 months. January was given 29 days, while February had the unlucky number of 28 days, suitable for the month of purification (Februa, the Roman festival of purification). This made a regular year (of 12 lunar months) 355 days long in place of the previous 304 days of the Romulus calendar.