How to quickly sort dict by date

Question

The following code generates a dict and sort it by date.

I want to reduce processing time for this code. The processing time on my PC is about 0.27 seconds.

Is there any better way?

You can change the type of date data if you can speed up this code(The date type is converted to the string type in this code).

import time
import datetime
import random
# 0.27 sec
dic_date = {}
for i in range(0, 100000):
    year = int(random.ramdom()*1000)
    str_date = '{0:%Y-%m-%d %H:%M:%S}'.format(datetime.datetime(year,1,1) + datetime.timedelta(days=i))
    dic_date[i] = {"dummy1":i, "dummy2":i, "date":str_date}

start = time.time()

dic_sorted = sorted(dic_date.items(), key=lambda x:x[1]["date"], reverse=True)

elapsed_time = time.time() - start
print ("elapsed_time:{0}".format(elapsed_time) + "[sec]")