v3.0.6 - Twig |date('U') returns nothing

[thisanimus]

Description

Attempt to display a datetime value in UNIX timecode format using the twig |date() filter

Steps to reproduce

1. Put {{ entry.postDate|date('U') }} in a template file.
2. Notice that this returns nothing.

Additional info

• Craft version: 3.0.6
• PHP version: 7.0.30
• Database driver & version: MySQL 5.6.38

[brandonkelly]

Just fixed this for the next release, but in the meantime you can just change |date('U') to .timestamp.

{{ entry.postDate.timestamp }}