Hey Ben, no worries—this is a straightforward task with Python's built-in datetime module, and I'll walk you through each step clearly.

1. Convert ISO 8601 String to Unix Timestamp (Seconds) #

First, we need to parse the ISO 8601 string into a datetime object, then convert it to a timestamp. The Z suffix in your date means it's in UTC timezone, so we'll handle that correctly to support all Python 3 versions:

from datetime import datetime

# Your input ISO date string
iso_date = "2022-06-01T10:36:56.000Z"

# Parse the string (replace 'Z' with '+00:00' for broad Python compatibility)
utc_dt = datetime.fromisoformat(iso_date.replace('Z', '+00:00'))

# Convert to Unix timestamp (seconds since epoch, UTC)
timestamp = utc_dt.timestamp()
print(timestamp)  # Output: 1654084616.0

If you need an integer timestamp instead of a float, just wrap it with int(timestamp).

2. Perform Arithmetic on the Timestamp #

Since the timestamp is a numeric value (float or integer), you can directly do addition, division, or any other arithmetic operations like you would with regular numbers:

# Example: Add 1 hour (3600 seconds) to the timestamp
updated_timestamp = timestamp + 3600

# Example: Divide the timestamp by 2 (just a demo operation)
divided_timestamp = timestamp / 2

3. Convert Modified Timestamp Back to Human-Readable Format #

To turn the adjusted timestamp back into a date string (like "Day/Date/Hour"), convert it back to a datetime object first (using UTC to match the original date), then use strftime() to format it to your needs:

# Convert timestamp back to UTC datetime object
updated_dt = datetime.utcfromtimestamp(updated_timestamp).replace(tzinfo=datetime.timezone.utc)

# Format to "Day/Date/Hour" (customize the format string as needed)
formatted_date = updated_dt.strftime("%a/%Y-%m-%d/%H")
print(formatted_date)  # Output: Wed/2022-06-01/11

Here’s a quick breakdown of the strftime codes used:

• %a: Abbreviated weekday name (e.g., "Wed")
• %Y: 4-digit year
• %m: 2-digit month
• %d: 2-digit day of month
• %H: 24-hour format hour

If you want a different layout (like full weekday name or 12-hour time), adjust the format string—for example, "%A/%d-%m-%Y/%I %p" would give you "Wednesday/01-06-2022/11 AM".

A quick note: Always stick to UTC for these conversions unless you explicitly need to work with a local timezone—this avoids unexpected offset errors.

内容的提问来源于stack exchange，提问作者Ben