The next Frequency Measuring Test (FMT) is scheduled for 0200 UTC on April 12. For us East-coasters, that would be 10 PM EDT on THURSDAY.
I’ve just powered up my gear so it will be sitting in a stable for the next 6 days. I still have to make the interface cable between my receiver and the sound card I will be using to do the Doppler observations and millihertz measurements using Spectrum Labs.
Here’s the ARRL Announcement from the April 2019 QST: