"""date utilities"""

from datetime import datetime

TF = '%Y-%m-%dT%H:%M:%SZ'
YMD = '%Y-%m-%d'

def to_epoch(string):
    if len(string) == 10:
        parsed = datetime.strptime(string, YMD)
    else:
        parsed = datetime.strptime(string, TF)
    count = int(parsed.strftime("%s"))
    return count