Kaley Cuoco and her boyfriend Tom Pelphrey are still going strong.

The couple’s recently showcased their love for each other in a mysterious way.

Cuoco uploaded a series of images on her Instagram story.

All the pictures featured a 1998 timestamp at the bottom.

Pelphrey also recently posted an image of them with the same timestamp.

The picture was one of them looking into each other’s eyes.

The joint timestamp filter brings many questions to mind.

Are the lovebirds trying to pass across a message about a special date?

Cuoco and Pelphrey first became an item in May.