Python fromtimestamp OSError

Question

For some reason when constructing datetimes using fromtimestamp, I get a \"OSError [Errno22] Invalid Argument\" when I use negative times less than -43200 (-12hrs). I am on

Answer 1

@wim's answer is correct, but anyone else arriving here might be interested in testing it (adjust range if you wish):

import datetime
import platform
print(
    "Running on Python ver.{} on {} {}\n" \
    .format(
        platform.python_version(),
        platform.system(),
        platform.release()
        )
)
for timestamp in range(1, 100000000):
    try:
        dt = datetime.datetime.fromtimestamp(timestamp)
    except:
        pass
    else:
        break
print(
    "Smallest accepted Unix timestamp by {}: '{}' ({})" \
    .format(platform.system(), timestamp, dt)
)

What I got was:

A:\src\X.utilities>test.py
Running on Python ver.3.6.1 on Windows 7

Smallest accepted Unix timestamp by Windows: '86400' (1970-01-02 02:00:00)