Num 15:37 And יהוה spoke to Mosheh, saying,
Num 15:38 “Speak to the children of Yisra’ĕl, and you shall say to them to make tzitziyot1 on the corners of their garments throughout their generations, and to put a blue cord in the tzitzit1 of the corners. Footnote: 1“Tzitzit” - plural Tzitziyot.
Num 15:39 “And it shall be to you for a tzitzit, and you shall see it, and shall remember all the commands of יהוה and shall do them, and not search after your own heart and your own eyes after which you went whoring,
Num 15:40 so that you remember, and shalldoall My commands, and be set-apart unto your Elohim.
Num 15:41 “I am יהוה your Elohim, who brought you out of the land of Mitsrayim, to be your Elohim. I am יהוה your Elohim.”
Deu 22:12 “Make tassels on the four corners of the garment with which you cover yourself.
The commandment says:
They must be worn so that they are visible (not tucked in).
They must be worn at all times when a person is "dressed." (Not just during prayer times.)
They should be worn attached to the four corners of the outer garment.
Each of the four fringes must contain one cord of blue.
While white is traditional color for the other cords, no particular color other than the one blue cord is specified.
The commandment is to "the children of Yisrael." Therefore, it appears that both men and women are commanded to wear them.
Tzitzit - Should Women Wear Them?
Some people ask whether or not women should wear them, and while there are those who would say no, the commandment seems clear that it is for all Yah's people, not just men. If you are new to this and choose to obey this commandment, DO NOT LET ANYONE (from Judah or otherwise) discourage you. Some WILL try. This is an example of Judah vexing Ephraim in these last days (Isa. 11:13)
Here are a couple of interesting sites on the topic.
"I have set watchmen on your walls, O Yerushalayim, all the day and all the night, continually, who are not silent. You who remember YHWH, give yourselves no rest, and give Him no rest till He establishes and till He makes Yerushalayim a praise in the earth."
This is a command, not an option! 
Yerushalayim Time