Because why not?
Wiring
Starting from the line follower with OLED example, connect the DS3231 module to SDA, SCL, GND and 3V3 as follows (for example):
Programming
Change code.py
to be just import ex07_line_follower_oled_ds3231
.
Result
The resulting robot is just the basic line follower that shows the current date and time (which can survive poweroffs as long as the dedicated DS3231 battery lasts).