Python2

from datetime import datetime
from pymongo import MongoClient

# Replace these with the appropriate values
mongodb_connection_string = "mongodb://your_username:your_password@your_host:your_port/your_database"
collection_name = "your_collection_name"

def insert_current_date(collection, date_iso8601):
    document = {"date": date_iso8601}
    result = collection.insert_one(document)
    print(f"Inserted document with _id: {result.inserted_id}")

if __name__ == "__main__":
    # Connect to MongoDB
    client = MongoClient(mongodb_connection_string)
    db = client.get_database()
    collection = db[collection_name]

    # Get the current date in ISO 8601 format
    current_date = datetime.now().isoformat()

    # Insert the current date into MongoDB
    insert_current_date(collection, current_date)

With a loop

import time
from datetime import datetime
from pymongo import MongoClient

# Replace these with the appropriate values
mongodb_connection_string = "mongodb://your_username:your_password@your_host:your_port/your_database"
collection_name = "your_collection_name"

def insert_current_date(collection, date_iso8601):
    document = {"date": date_iso8601}
    result = collection.insert_one(document)
    print(f"Inserted document with _id: {result.inserted_id}")

if __name__ == "__main__":
    # Connect to MongoDB
    client = MongoClient(mongodb_connection_string)
    db = client.get_database()
    collection = db[collection_name]

    while True:
        # Get the current date in ISO 8601 format
        current_date = datetime.now().isoformat()

        # Insert the current date into MongoDB
        insert_current_date(collection, current_date)

        # Sleep for 1 second
        time.sleep(1)