This time the reason for the switch isn't TV but because Hearts are still in the League Cup. The first weekend in February is when the semi-finals are due to be played in this year's competitions and as the Jambos beat rivals Hibs last night they'll have a last four clash to prepare for instead of welcoming us to Tynecastle.
A new date for the game has still to be announced but it'll probably be a midweek match unless we're both knocked out of the Scottish Cup early doors.
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Source: Mirren MAD