My game has been stuck on 1-day increments for about 6 in-game months now. I checked the SM log text file, and every day has this in it:
15th April 2080 22:15:31,SM Only,System 0,Sub-pulse length adjusted due to potential fleet interception
16th April 2080 01:15:31,Precursors,Anikushin,An active sensor contact (Active Sensor S33.6/R100) associated with Hawkesbury 002 has been lost
16th April 2080 01:30:31,Precursors,Anikushin,Destination contact not found for Precursors Fleet #13076
16th April 2080 01:30:31,Precursors,Anikushin,New Active Sensor Detected! Contact ID: Hawkesbury 002, Class ID: Hawkesbury, Race ID: Diesel Aliens #1048, Strength 3360, Resolution 100