@@ -13,7 +13,7 @@ import json

 import yaml

 import struct

 import argparse

-from datetime import datetime

+from datetime import datetime, timezone

 from binascii import hexlify, unhexlify

 # Documents used as reference to implement the keytab format:

@@ -37,6 +37,7 @@ DEFAULT_PREFIX=BIG_ENDIAN

 DEFAULT_ENCODING='ascii'

 VERBOSITY=1

 CALCSIZE={}

+now = None

 # The following table is based on [3]:

 NAME_TYPES = {

@@ -474,6 +475,9 @@ def simple_timestamp_to_full(inentry, index, entry):

 	elif 'date' in inentry:

 		entry['date'] = inentry['date']

 		if inentry['date'] == 'now':

+			global now

+			if now is None:

+				now = int(datetime.now(timezone.utc).timestamp())

 			entry['timestamp'] = now

 		else:

 			try:

@@ -497,7 +501,6 @@ def simple_enctype_to_full(inentry, index,  entry):

 	return 2

 def simple_keytab_to_full(indata):

-	now = int(datetime.now().timestamp())

 	data = {

 		'version': indata.get('version', 2),

 		'records': [],