Timeseries showing wrong data for dates with different time zones

[arcataroger]

Demo: https://fusioncharts-dst-bug.vercel.app/ Minimal reproducible example: https://github.com/arcataroger/fusioncharts-dst-bug/blob/master/src/App.js

Issue Description

When a timeseries chart shows daily data points with no time zones specified (the graph labeled "Chart of expected results"), everything seems to work right.

However, if the data includes time zones different from the current browser time, the values and dates seem to become misaligned.

This can happen, for example, when:

• The dataset includes time zones different from the browser time (e.g., browser is in PST but dataset includes CST timestamps)
• The dataset includes two or more time zones, one of which is different from browser time (e.g. browser time is in Pacific Daylight Time, but half the data points are in Pacific Standard Time)
• The above are combined

Steps to reproduce

Make a timeseries chart with the following dataset:

Data:

[
    ["2022-03-11T00:00:00-08:00", 53.1814],
    ["2022-03-12T00:00:00-08:00", 50.7],
    ["2022-03-13T00:00:00-08:00", 50.2547],
    ["2022-03-14T00:00:00-07:00", 62.9599],
    ["2022-03-15T00:00:00-07:00", 70.7427],
    ["2022-03-16T00:00:00-07:00", 65.3493]
]

Schema:

let schema = [
    {
        name: "Time",
        type: "date",
        format: "%Y-%m-%dT%H:%M:%S%Z"
    },
    {
        name: "Value",
        type: "number"
    }
]

[arcataroger]

This issue concerns 3.18, but it may be related to a similar issue in 3.16. In that version, the display will be incorrect even if the time zone is stripped from the chart data.