apache-solr-ref-guide-4.6.pdf

The refreshInterval is minutes, so the above example will download the newest rates every 60 minutes.
Working with Dates
Date Formatting
Solr's TrieDateField (and deprecated DateField) represents a point in time with millisecond precision. The format used is a restricted form
of the canonical representation of dateTime in the XML Schema specification:
YYYY-MM-DDThh:mm:ssZ
YYYY is the year.
MM is the month.
DD is the day of the month.
hh is the hour of the day as on a 24-hour clock.
mm is minutes.
ss is seconds.
Z is a literal 'Z' character indicating that this string representation of the date is in UTC
Note that no time zone can be specified; the String representations of dates is always expressed in Coordinated Universal Time (UTC). Here is an
example value:
1972-05-20T17:33:18Z
You can optionally include fractional seconds if you wish, although trailing zeros are not allowed and any precision beyond milliseconds will be
ignored. Here are examples value with sub-seconds include:
Date Math
1972-05-20T17:33:18.772Z
1972-05-20T17:33:18.77Z
1972-05-20T17:33:18.7Z
Solr's date field types also supports date math expressions, which makes it easy to create times relative to fixed moments in time, include the
current time which can be represented using the special value of " NOW".
Date Math Syntax
Date math expressions consist either adding some quantity of time in a specified unit, or rounding the current time by a specified unit. expressions
can be chained and are evaluated left to right.
For example: this represents a point in time two months from now:
NOW+2MONTHS
This is one day ago:
NOW-1DAY
A slash is used to indicate rounding. This represents the beginning of the current hour:
NOW/HOUR
The following example computes (with millisecond precision) the point in time six months and three days into the future and then rounds that time
to the beginning of that day:
NOW+6MONTHS+3DAYS/DAY
Note that while date math is most commonly used relative to NOW it can be applied to any fixed moment in time as well:
1972-05-20T17:33:18.772Z+6MONTHS+3DAYS/DAY
Request Parameters That Affect Date Math
Apache Solr Reference Guide 4.6
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