utils.py

from datetime import datetime, timezone


def time_since(dt):
    """
    Returns string representing "time since" e.g.
    """
    now = datetime.now(timezone.utc)
    diff = now - dt

    seconds = diff.total_seconds()
    minutes = int(seconds // 60)
    hours = int(minutes // 60)
    days = int(hours // 24)
    months = int(days // 30)
    years = int(days // 365)

    if years > 0:
        return f"{years} year{'s' if years > 1 else ''} ago"
    elif months > 0:
        return f"{months} month{'s' if months > 1 else ''} ago"
    elif days > 0:
        return f"{days} day{'s' if days > 1 else ''} ago"
    elif hours > 0:
        return f"{hours} hour{'s' if hours > 1 else ''} ago"
    elif minutes > 0:
        return f"{minutes} minute{'s' if minutes > 1 else ''} ago"
    else:
        return f"{int(seconds)} second{'s' if seconds > 1 else ''} ago"