why doesn't my timestamp hours change?

#!/usr/bin/env python3
import datetime
from collections import OrderedDict
import sys

from peewee import *

db = SqliteDatabase('diary.db')


class Entry(Model):
    content = TextField()
    timestamp = DateField(default=datetime.datetime.now)

    class Meta:
        database = db


def initialize():
    """create the database and the table if they don't exist"""
    db.connect()
    db.create_tables([Entry], safe=True)


def menu_loop():
    choice = None

    while choice != 'q':
        print('Enter "q" to quit.')
        for key, value in menu.items():
            print('{}){}'.format(key, value.__doc__))
        choice = input('Action: ').lower().strip()

        if choice in menu:
            menu[choice]()


def add_entry():
    '''add an Entry'''
    print('Enter you Entry. Please enter ctrl+ D when you finished')
    data = sys.stdin.read().strip()  # stdin.read() capture all the data that we type on the screen

    if data:
        try:
            if input('Save Entry y/n?').lower() != 'n':
                Entry.create(content=data)
                print('saved successfully! ')
        except EOFError:
            print("save aborted")


def views_entries(search_query=None):
    '''views entries'''
    entries = Entry.select().order_by(Entry.timestamp.desc())
    if search_query:
        entries = entries.where(Entry.content.contains(search_query))

    for entry in entries:
        timestamp = entry.timestamp.strftime('%A %B %d, %Y %I:%M%p')
        print(timestamp)
        print("=" * len(timestamp))
        print(entry.content)
        print('n) next entry')
        print('q) return to main menu')

        next_action = input("Action; [Nq)").lower().strip()
        if next_action == 'q':
            break


def search_entries():
    '''Search entries for string'''
    views_entries(input("search queries"))


def del_entry(entry):
    pass


menu = OrderedDict([
    ('a', add_entry),
    ('v', views_entries),
    ('s', search_entries),

])

if __name__ == "__main__":
    initialize()
    menu_loop()