It is Sunday Night on Monday.

The SPEI Global Drought Monitor (click here)  offers near real-time information about drought conditions at the global scale, with a 1 degree spatial resolution and a monthly time resolution. SPEI time-scales between 1 and 48 months are provided. The calibration period for the SPEI is January 1950 to December 2010. The starting date of the dataset is 1955 in order to provide common information across the different SPEI time-scales....

Don't expect the global drought monitor to pass information about the existing desserts, including ice fields and glaciers such as Greenland. That is why they are in white. There is no drought data for deserts and the North Pole and the South Pole are considered deserts.