Gmail date format

from datetime import datetime,time
from django.utils.dateformat import DateFormat 

register = Library()

@register.filter
def humantime(t):
    now = datetime.now()
    if datetime.combine(now, time()) < t and t < datetime.combine(now + timedelta(1), time()):
        f = 'g:i a'
    elif now.year == t.year:
        f = 'M j'
    else:
        f = 'n/j/y'
    df = DateFormat(t)
    return df.format(f).replace('.m.', 'm')