As of today, here are key monthly indicators followed by the NBER Business Cycle Dating Committee:

Figure 1: Nonfarm payroll employment (blue), industrial production (red), personal income excluding transfers in Ch.2012$ (green), manufacturing and trade sales in Ch.2012$ (black), and monthly GDP in Ch.2012$ (pink), all log normalized to 2019M02=0. Source: BLS, Federal Reserve, BEA, via FRED, Macroeconomic Advisers (5/29 release), Bloomberg, and author’s calculations.
The NBER Business cycle Dating Committee has dated the most recent peak at February 2020 for monthly data, and 2019Q4 for quarterly. Jeffrey Frankel describes the reasoning for this date.
Q2 nowcast from Atlanta Fed is -48.5% (6/9), from NY Fed is -25.9% (6/12), St. Louis Fed is -38.9%(6/12), all SAAR. IHS Markit is -37.4% as of today.