In our standard Gregorian calendar, we can use BC/AD or CE/BCE to denote dates which precede or follow some critical event. In the Alternative calendar I see no means to create that critical event, so as a workaround I input negative dates as well as positive dates to indicate some dates precede, and some dates followed a critical event, e.g. -4500.003, -3500.054, 4900.224 and 5387.002. But when I look at the timeline it displays them in the following order: -3500.054, -4500.003, 4900.224 and 5387.002.

It looks like the dates are being displayed in ascending order in the timeline but anything with a negative number is treated as text (just my theory).

How can I get dates prior to some critical event to show in descending order and dates that follow the critical event to show in ascending order?