Question:
Shalom Rav
I did not have time to say the blessing of the moon at the end of the shabat, can I do the blessing on the evening of the 15th shevat?
If I can’t see the moon from where I live, should I travel to another city to try to see the moon?
Answer:
Indeed you can without any problem make the blessing of the moon the night of 15 shevat until 01h23 in Israel. Since the time of the blessing is the 15th day after the renewal of the moon
You must, if you are in another country check at what time the renewal of the moon took place and count 15 full days since this moment.
regarding your question if you have to travel to another city, if you know from a sure source that from this other place you will see the moon you have to go there. However in a real way it is not the place which fixes but the moment, because the clouds are carried by the wind all the time. So you don’t need to travel to another city but watch the sky to see if the clouds have dispersed and let the moon appear in time to do the blessing immediately.
Hoping you can observe the moon in its entirety
everyone who makes the blessing in his time is considered as if he received the divine presence
Sources and reasoning