Our schedules data is sourced from some 900 airlines that send SSIMs to Cirium. We receive schedule updates every day and then compile the data into a master file that gets updated every Friday night, around 9pm CST.
The date ranges of updates are available on the Diio Mi / SRS Analyser Home Page, Miscellaneous section. You can also view the dates of recent data updates and historical loads here.
more reading : UPDATE: Diio Mi and SRS Schedule load process changes (Effective April 2nd 2021) – Cirium Help Desk
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