ENH: add microsecond format support in read_raw_snirf (mne-tools#11804)

Co-authored-by: Daniel McCloy <[email protected]>

doc/changes/latest.inc

@@ -42,6 +42,7 @@ Bugs
 - Fix bug that required curv.*h files to create Brain object (:gh:`11704` by :newcontrib:`Aaron Earle-Richardson`)
 - Extended test to highlight bug in :func:`mne.stats.permutation_t_test` (:gh:`11575` by :newcontrib:`Joshua Calder-Travis`)
 - Fix bug that used wrong indices for line/label styles (sometimes causing an ``IndexError``) in :meth:`mne.preprocessing.ICA.plot_sources` under certain conditions (:gh:`11808` by :newcontrib:`Joshua Calder-Travis`)
+- Fix bug with :func:`~mne.io.read_raw_snirf` to handle files with measurement time containing milliseconds (:gh:`11804` by :newcontrib:`Daniel Tse`)
 - Fix bug where :meth:`mne.viz.Brain.add_volume_labels` used an incorrect orientation (:gh:`11730` by `Alex Rockhill`_)
 - Fix bug with :func:`mne.forward.restrict_forward_to_label` where cortical patch information was not adjusted (:gh:`11694` by `Eric Larson`_)
 - Fix bug with PySide6 compatibility (:gh:`11721` by `Eric Larson`_)

doc/changes/names.inc

@@ -106,6 +106,8 @@
 
 .. _Daniel Strohmeier: https://github.com/joewalter
 
+.. _Daniel Tse: https://github.com/Xiezhibin
+
 .. _Darin Erat Sleiter: https://github.com/dsleiter
 
 .. _David Haslacher: https://github.com/davidhaslacher

mne/io/snirf/_snirf.py

@@ -419,7 +419,12 @@ def natural_keys(text):
             str_datetime = str_date + str_time
 
             # Several formats have been observed so we try each in turn
-            for dt_code in ["%Y-%m-%d%H:%M:%SZ", "%Y-%m-%d%H:%M:%S"]:
+            for dt_code in [
+                "%Y-%m-%d%H:%M:%SZ",
+                "%Y-%m-%d%H:%M:%S",
+                "%Y-%m-%d%H:%M:%S.%f",
+                "%Y-%m-%d%H:%M:%S.%f%z",
+            ]:
                 try:
                     meas_date = datetime.datetime.strptime(str_datetime, dt_code)
                 except ValueError: