[Python] Matplotlib show time ticks every two hours with minute offset

I want to make a graph with Matplotlib. I want the X-axis ticks to be every 2 hours and aligned with my data.

Using ser_major_locator(mdates.MinuteLocator()) may accept interval=120 to make ticks every two hours, but this does not align with the data. MinuteLocator() will accept a range to byminute which satisfies the offset desire, but this will place ticks every hour.

Here's an example:

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
from datetime import datetime, timedelta

start_time = datetime(2025, 9,15, 12, 37)
t = [start_time, start_time + timedelta(hours=2), start_time + timedelta(hours=4)]
values = [4,2,7]
plt.plot(t,values)
ax = plt.gca()
ax.xaxis.set_major_locator(mdates.MinuteLocator(interval=120))
plt.grid(True)
plt.show()

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