CommonFormatDateTestCase::testFormatDiff in core/modules/simpletest/tests/common.test

Tests the formatDiff method.

date_format_interval in core/includes/date.inc

Formats a time interval with granularity, including past and future context.

format_time_diff_since in core/includes/common.inc

Formats the time difference from a timestamp to the current request time.

format_time_diff_until in core/includes/common.inc

Formats the time difference from the current request time to a timestamp.

theme_date_time_ago in core/modules/date/date.theme.inc

Returns HTML for a date in the format 'time ago'.

views_handler_field_date::render in core/modules/views/handlers/views_handler_field_date.inc