Inter-channel mis-synchronisation can be a limiting factorto the time resolution of high performance timing detectors withmultiple readout channels and independent electronics units. Inthese systems, time calibration methods employed must be able toefficiently correct for minimal mis-synchronisation between channelsand achieve the best detector performance. We present an iterativetime calibration method based on Markov Chains, suitable fordetector systems with multiple readout channels. Starting fromcorrelated hit pairs alone, and without requiring an externalreference time measurement, the method solves for fixed per-channeloffsets, with precision limited only by the intrinsic single-channelresolution. A mathematical proof that the method is able to find thecorrect time offsets to be assigned to each detector channel inorder to achieve inter-channel synchronisation is given, and it isshown that the number of iterations to reach convergence within thedesired precision is controllable with a single parameter. Numericalstudies are used to confirm unbiased recovery of trueoffsets. Finally, the application of the calibration method to theSuper Fine-Grained Detector (SuperFGD) and the Time of Flight (TOF)detector at the upgraded T2K near detector (ND280) shows goodimprovement in overall timing resolution, demonstrating theeffectiveness in a real-world scenario and scalability.