Python script to automate thank you messages to "Happy Birthday" posts. Get appropriate permissions like read_stream etc. This is Akshit Khurana's script from Quora answer http://qr.ae/pLLZL and includes minor modifications.

HappyBirthdayPost.py

import requests
import json

# This is Akshit Khurana's script from Quora answer with minor modifications
# http://qr.ae/pLLZL

# Get your token from  https://developers.facebook.com/tools/explorer/
TOKEN = ''
# Get unix epoch time just before your birthday
# http://www.epochconverter.com/
AFTER_TIME = 1383436800

def get_posts():
    """Returns dictionary of id, first names of people who posted on my wall
    between start and end time"""
    query = ("SELECT post_id, actor_id, message FROM stream WHERE "
             "filter_key = 'others' AND source_id = me() "
             " AND created_time > 1383436800 LIMIT 200")
    print("query %s" % query)

    payload = {'q': query, 'access_token': TOKEN}
    r = requests.get('https://graph.facebook.com/fql', params=payload)
    result = json.loads(r.text)
    return result['data']

def commentall(wallposts):
    """Comments thank you on all posts"""
    count = 0
    for wallpost in wallposts:
        print ("%s" % wallpost['message'])
        r = requests.get('https://graph.facebook.com/%s' %
                wallpost['actor_id'])
        user = json.loads(r.text)
        fname = user['first_name']
        print (fname)
        # Add some exceptions if necessary.
        if fname == 'Dipak':
            fname = 'Papa'
        # Some randomness ;)
        count = count + 1
        if count % 3 == 0:
            message = 'Thank you %s! How is it going?' % fname
        else:
            message = 'Thanks %s!' % fname
        print (message)
        url = 'https://graph.facebook.com/%s/comments' % wallpost['post_id']
        payload = {'access_token': TOKEN, 'message': message}
        s = requests.post(url, data=payload)

if __name__ == '__main__':
    commentall(get_posts())