Get your age in seconds. And find out when you hit that integer exponent in your favorite base

life_in_seconds.py

#!/usr/bin/env python3
import argparse
import math
from datetime import datetime, timezone, timedelta


def get_tob_from_str(tob_str):
    # Time of birth
    try:
        tob = datetime.strptime(tob_str, "%Y-%m-%dT%H:%M:%S%z")
    except ValueError:
        print('illegal format')
        exit(1)
    x = datetime.now(timezone.utc) - tob
    print("You are currently {:,} seconds old".format(int(x.total_seconds())))
    return tob


def print_fun(tob, base, exponents):
    for ex in exponents:
        try:
            dt = tob + timedelta(seconds=base**ex)
        except OverflowError:
            exit()
        if dt > datetime.now(timezone.utc):
            print('You will be {}^{:2d} seconds old at {}'.format(base, ex, dt))
        else:
            print('You were {}^{:02d} seconds old at {}'.format(base, ex, dt))


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='Get your age in seconds. And'
                                     ' find out when you hit that integer'
                                     ' exponent in your favorite base')
    parser.add_argument('-t', '--tob_str', help='1987-05-31T06:45:00+0530',
                        default='1987-05-31T06:45:00+0530')
    parser.add_argument('-b', '--base', help='base', default=math.e)
    args = parser.parse_args()
    tob = get_tob_from_str(args.tob_str)
    exponents = range(0, 50, 1)
    if args.base in ['E', 'e']:
        base = math.e
    elif args.base in ['pi', 'PI', 'Pi']:
        base = math.pi
    elif args.base in ['tau', 'TAU', 'Tau']:
        base = math.tau
    else:
        base = float(args.base)
    if base in [1, 1.0]:
        exit()
    if int(base) == base:
        base = int(base)
    print_fun(tob, base, exponents)

try Julian Days